1. It will perform gaming better than the SXPS 1640 since it has lower resolution, but the speaker is quite soft if you intend for movies. It also has high temperature when gaming.
2. It has better screen and speaker+subwoofer compared to A42Jv. When comparing A42Jv and SXPS 1640 side-by-side, you can see A42Jv's screen is yellowish. Gaming performance still decent but need overclocking. Temperature can be quite cool after doing some maintenance.

RM2699/RM2799 for Core i5 N45SF/N55SF
N53Sn Core i7 RM3299

This post has been edited by lee_what2004: Dec 29 2011, 05:45 PM

15'', higher screen resolution and matte..

Bang & Olufsen speaker + external subwoofer

Still not enough for Ultra though..

6770M..

Only black..

Dell XPS 15 with B+RG LED 1080p screen.
Dell Precision M4600 with IPS RGBLED upgrade

14'':
Asus N45Sf-V2g-VX054v [black], i5-2430M + Nvidia GT555m (2GB)@RM2699[Bang & Olufsen]; USB3.0, Sonic Master subwoofer
Lenovo Y470, i7-2630QM + Nvidia GT550M@RM2999[JBL]
HP Pavilion Dv4-3006/3106/3107TX, i5-2410M + AMD HD6750@RM2899, colors: Black/red

13'':
Dell Vostro 3350, i5-2430M + AMD HD6490M@RM2536[2.04kg], W7HB, backlit keyboard, Belkin Radius 15.6" Backpack
Sony Vaio VPCSB36FG, i5-2430M + AMD HD6470M@RM2999[1.72kg], colors: White/Silver/Pink/Blue/Black

This post has been edited by lee_what2004: Dec 30 2011, 11:44 AM

Performance in gaming, the Asus N series better.
But if you need faster CPU, the Inspiron 15R wins.

RM2599 for Dell, RM2799 for Asus.

Pretty much same answer like N55SF since they have same spec.

N43SL is the Jay Chou version, same price N45SF but weaker GPU, RM2699..

HP DM1, Asus 1215B ?

What kind of light gaming? Need dedicated graphic card?
Preferring 13''? 14''?

If need long battery life, Asus U46Sv,
If need quad core, Lenovo Y470
If want better graphic card and speaker, Asus N45SF
If want anti-glare screen, Vostro 3450..

Performance and cost..
Intel processor generally faster but more expensive..

Its not just the resolution, but the display quality itself, the contrast, black level, etc..

Pretty much no laptop in 2.5K got 2 HDD slot except you take out the optical drive..

Depends the HDD caddy you get, supposedly can use back the lid from the optical drive and attach it to the HDD caddy and it will look nothing change.
HDD caddy is around RM100

Around RM2.5K, try look for Asus N45SF/N55SF nVidia GT555M or HP DV6 with HD6770M
else other choice only comes with the weaker GPU like nVidia GT540M ( Asus N53Sv/Asus A43Sv), AMD HD6730M (Asus A43Sa),

Above 2.5K, Asus G53Sx @ RM 3999

^nope, those laptop is using HDD + mSATA SSD, no second slot for HDD, only for mSATA SSD, the port look alike mPCIe, the one for wifi card.

^Y470/Y570 you can have HDD + SSD + Optical Drive at the same time..