Gave us a bunch of info, but lack the all important "price" indicator.
Read the 1st post of this thread, and try to understand the logic of "suggested format" lah 
Compute that 

It really doesn't matter about "brand", it's about models line-up of brands.
Toshiba is not all "round", look at Tecra line.
Inspiron is consumer class laptop. Vostro is entry-level business class. Vostro 5460, I'm not sure it's even business class anymore
Satellite is also consumer class laptop.
Thinkpad T series, however, is proper business class laptop. T430 not necessary spec with "lousy" screen and "bad" battery. If you buy retails, you are stuck with the spec Lenovo Malaysia push out. If you get through corporate account, you can demand HD+ screen (1600x900) and bigger capacity battery.

Anyway, for all the models you mentioned, except Thinkpad T&W (which production is gradually being moved back to Japan), the rest are all manufactured in China by the big OEM.

If you appreciate Thinkpad T430 good built quality and ventilation, then for Dell you should consider Latitude E5/6 series, or for HP Elitebook, or for Toshiba Tecra, or for Asus PRO.
And proper business class laptop is not going to be "cheap".

Asus
PRO45VJ-V0049X, i7-3520QM + Nvidia GT635M@RM3099[2.4kg], 8GB, 750GB, W7P
PRO45VJ-V0047X, i5-3230M + Nvidia GT635M@RM2399[2.4kg], 4GB, 500GB, W7P
Dell
Latitude E5430, i5-3320M + Intel HD4000@RM3200, 4GB, 320GB(5400rpm), W7P (32-bit)/W8 Pro, 3 years pro support; [CPU Options: i5-3320M - i7-3520M], HD+ screen upgradable
Latitude E6430, i5-3320M + Intel HD4000@RM4300, backlit keyboard, 3 Years, W7P (32-bit); [CPU options: i5-3320M-i7-3720QM][GPU option: Nvidia NVS 5200M], HD+ screen upgradable
HP
EliteBook 8470p, i5-3360M + AMD HD7570M@RM3999, 4GB, 750GB(7200rpm), W7P/W8, 3 years warranty
EliteBook 8470w, i7-3520M + AMD FirePro M2000@RM4999, 4GB, 500GB(7200rpm), W7P, anti-glare, 3 years
Toshiba
Tecra-R940-2021X, i7-3540M + AMD HD7570M@RM4999[2.15kg], W7P/W8P, 4GB, 640GB (7200rpm), 3 years international (local onsite) warranty, Microsoft Office HOme & Business 2013

time for you to try business / corporate line up laptops, I agree dell latitude / precision series or lenovo thinkpad series (those  expensive one) will have better quality than most consumers laptops in the market now...

One thing to note from Lenovo is their lousy customer service...my employer is a big fan of Lenovo and all our developers used to use Lenovo thinkpads..but the customer service is ... speechless -.-

I am not trying to complain..but sadly we pay so much to get so much pain...

of you have one more alternative for consumer line up ... which is apple... it has overall best keyboard, best touchpad, overall best built quality, best overall battery life... if you still want run windows, you can always bootcamp and install windows in it... the cons is the price tag and the screen not yet retina yet, but its TN panel screen already very good and even beats many so-called IPS screens in the market (unless 15" at RM 6799 with outdated ivy bridge processor)

if not for work... we actually do not need to rely on windows that much (compare with 10 years ago)... even for architecture student, they can actually adapt mac earlier...

just for positive consideration and discussion, i sad at market no one actually making good quality laptops...

bulky , glossy , very normal build quality 

the Pros - with window 7 pro + warranty support

Lenovo has to "leverage" the Thinkpad brand (they paid big money for it )
Dell has Vostro, HP has Probook, so Lenovo has to counter with Edge, stick a Thinkpad to make it sound nicer

V series basically is a consumer laptop.

Edge - you have the Thinkpad small business software suite, the fingerprint reader, blah blah blah ...
Built quality is still pretty good, but the screen is really cheap stuff.
And don't drop this on the floor like a T series. My numerous T series had suffered my abuse over the years (fell down 1 flight of stair case, dropped from shoulder height to floor, food and drinks spill, bang on keyboard ... ) and survived.
The Edge 430 I bought for my wife 5 months ago has its bottom top left corner cracked on 1 drop to the floor from table Still running but we can see the mainboard

Lenovo has to "leverage" the Thinkpad brand (they paid big money for it )
Dell has Vostro, HP has Probook, so Lenovo has to counter with Edge, stick a Thinkpad to make it sound nicer

V series basically is a consumer laptop.

Edge - you have the Thinkpad small business software suite, the fingerprint reader, blah blah blah ...
Built quality is still pretty good, but the screen is really cheap stuff.
And don't drop this on the floor like a T series. My numerous T series had suffered my abuse over the years (fell down 1 flight of stair case, dropped from shoulder height to floor, food and drinks spill, bang on keyboard ... ) and survived.
The Edge 430 I bought for my wife 5 months ago has its bottom top left corner cracked on 1 drop to the floor from table Still running but we can see the mainboard

soon... maybe right after you bought it...

anyway what makes you choose T430u instead T431s, price?

Hi all,sorry to disturbing everyone again but I have some question here..
err...
I going to study Engineering course soon...I had check through the internet and they are advising me
1)processor must be fast(2Ghz or above)
2)Ram should be higher(6GB++)
3)Battery life have to about 5 hours..(Well,this is one of the problem,so far as I know,for most kind of laptop with fast processor,its battery will not last long,around 2to 3 hour at most right?..haiz )
So,currently,any suggestion laptop for me?hopefully not so expensive...
And sometimes I play game too (but this one is optional  ) hehe..

thanks all!!

degree in civil eng...so,yes,undergraduate...
Actually I am newbie in this field....

I don't think you should burn your dad's pockets with the MacBook 15 Retina Display man lol... earn your own money for one later on

Actually you can also go for an above-average notebook and an external monitor with good color reproductions (if your photo and video editing work is very serious) too. Still cheaper than the MBP 15 

Or just get an Illegear with the top screen upgrade, its a viable option as well
Since I am also into photo editing (not video though ), RAM > CPU > GPU. These are the main requirements (in that arrangement) for Photoshop. If I were you, I will go for an Illegear RE-15, upgrade the RAM to 16GB, opt for an SSD, warranty extension and of course, the screen upgrade.
Just my 2 cents