go for xps 15 without doubt..go for full hd ..upgrade ram to 8gb ..upgrade to full hd..upgrade warranty to 3 years ..and backlit keyboard..also upgrade to 256gb ssd..that should work out best for you
Added on September 2, 2011, 2:00 ami just tried a asus n55..it looks really heavy..3kg for a 15 inches is very very heavy..in 1 year it will feel like a heavy rock...it will feel boring to carry a rock or a stone with you...dont buy any 15 inches more than 2.5 kg..
ur budget of 5k....huge....
asus
G53Sx-SZ039v, i7-2630QM + Nvidia GTX560M (2GB)@RM3999, backlit keyboard, gaming backpack & mouse <--- this is a beast ... for a gamer...
N55Sf-SX047v, i7-2630QM + Nvidia GT555m (2GB) + Bluray@RM3699[Bang & Olufsen]; USB3.0, Sonic Master subwoofer<----good buy.^^
dell
XPS 15, i7-2630QM + Nvidia GT540M@RM3699 [JBL], upgradeable to FullHD, backlit keyboard customizable<-- weaker gpu.. but overall very ok... u got the speakers.. u got the backlit keyboard.... and u got i7 in it... XD also fullhd!!
hp
Dv6-6108TX, i7-2720QM + AMD HD6770 + BluRay@RM4721 [Beats][2.63kg], [8GB RAM] Beats headphones; HP optical mouse, HP AIO printer; 3 years onsite warranty <---the warranty would do nice.

also the gpu is a beast! iirc abit\ better than gt555m...
lenovo
IdeaPad Y570, i7-2630QM + Nvidia GT555M + Bluray@RM3699[JBL]<---another option...@@....
sager
NP8150, i7-2630QM + Nvidia GTX560M + (1920x1080)@RM4899, FreeDOS [CPU Options: i7-2630M - i7-2920XM]<----very good specs.... but it doesn't look striking.... have to order frm illegear... ^^BEST BANG FOR BUCK!!!!!
here are the options... XD.... and i doubt any of them willl go over the 3kg mark..@@.. that is the area of 17 inchers de....
I saw the ASUS G53SX series, specification is damn good but the design is horrible, no offence, lol.