What programming? Will you always use arrow keys?
Highly recommended tactile switches for typing. 

Recommendation:
- Vortex Poker Series (Poker 2 or latest Pok3r) MX Brown [Below <RM 400]

- PFU HHKB (Topre 45g) [Below <RM 900]

- Filco Majestouch 2 TKL MX Brown [below <RM 400]


That's all my recommendations.

http://deskthority.net/wiki/Cherry_MX_Green
It's basically a blue with stiffer/heavier spring.

Clears are usually modded, it is like a heavier brown.Modded ones are called ergo clears. Lubed and changed with lighter springs.

Both not widely available in the market, occasionally will have some models of keyboard using them. More to be found in the custom keyboard community nowadays.

it's not so much about suitable for what kind of application, but more so on suitable to the user's preference (and finger strength).
the stock mx clear switch is quite heavy and the most non-clicky tactile the switch can offer. this is mainly for people who has heavy finger or heavy typing.
but one can mod the switch by replacing the springs to lighter springs, depending on their preference.

same goes to mx green. it's basically mx blue switch with heavy spring.

as for which application, it can be used for anything, just depends on the user's preference.

i think most keyboards are compatible to macosx...but i am not 100% sure since i don't have a mac to test it out.
you are in penang?

Not really. Some boards have problem with Mac because of the NKRO workaround.

However, most recent boards are 100% compatible.

So the issue with compatibility is one issue that buyers must be aware of is only when they buy 2nd hand boards, and even then it is possible to have a simple workaround.

Ya, you are right. I still remember, if on NKRO for Ducky 2 will made keys register go haywire when using Mac.
Btw, HHKB, Filco, CM Storm or recent 1 are compatible with Mac.

CM Storm QFR-i.

But not recommended for typist get LED keyboard because you will never use it. Get a table lamp instead.
Just my own opinion. 

When I say custom, it must come with either:
A) BSP/GMK caps
B) SP groupbuy caps in unique colourways (SA>DSA, but accept either).

Anything else is moot and pointless.
Dunno how many times must tell you: Large images pls put spoiler tag. Disruptive for the flow of conversation...
But yeah, caps must have theme or why buy caps at all.

LED will die after sometime. My CM Storm QFR-i still ok. 
Never know CM Storm is the king. 
K70 always the king in my heart. 
If you wish for dedicated arrow keys, then go for Filco.
You need press FN+ certain keys to get arrow keys in HHKB. You may go for Realforce 23U for the dedicated arrow keys.
Well, for those use VIM, they don't use cursor.
Else, just get used to the HHKB layout...

Just FYI, the base price to get a set of B87 unassembled will set you back close to RM700, this is not including switches, all the assembly and soldering work that you have to pay someone to do it.

When you have a custom, I assume you'll not be satisfied with a set of cheap key set, so a set of high quality one may cost you 200-500 or even more.

It will easily go close to 1k, be careful what you wished for

Lots of artisan key caps are very expensive, as they are made in small amount, and handmade. This is alu one, so seems okay for that price.