14"
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A43Sv-VX264v, i5-2430M + Nvidia GT540M(1GB)@RM2349[2.44kg]
A43Sa-VX083v, i5-2430M + AMD HD6730@RM2499
Inspiron 14R (N4110), i5-2410M + AMD HD6630@RM2349, 4GB, 640GB, *Big Giant Plaid!Lid
Vostro 3450, i3-2330M + AMD HD6630@RM2317, W7HB,Belkin HDMI cable, Belkin Radius 15.6" Backpack
Satellite L745-1053XB/54XR/56XW, i5-2430M + Nvidia GT525M@RM2399[2.14kg], Colors: Brown/Red/White, 2nd year warranty
15"
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A53Sv, i5-2410M + Nvidia GT540M (1GB)@RM2349, USB3.0
Inspiron 15R, i5-2430M + Nvidia GT525M@RM2299
Vostro 3550, i5-2430M + AMD HD6630@RM2577, W7HB, backlit keyboard, Belkin Radius 15.6" Backpack
Satellite L755-1009X,i5-2430M + Nvidia GT525M@RM2299, 2nd year warranty
Satellite L755-1019X,i5-2430M + Nvidia GT525M@RM2399
for one thing, it's dual core against quad core. so imo you will benefit from extra cpu power for AutoCAD and any other cpu intensive stuff. for gaming, gt555m should be able to handle all the game with good fps. So I'd say n55sf is pretty decent choice.
edit: given 3k budget, you can also get hp dv6 without beats with spec of i7-2630QM + AMD HD6770
Thanks for the info. For N55sf i7 or i5 is recommended? The price diference is quite huge. And If N55SF i7 core compare with N53 i7 core( the difference is only the graphic card) which is more worth for its money?