Next step up that is worth your while is this Lenovo:
Y400, i7-3630QM + Nvidia GT650M@RM2799, 4GB, 500GB, W8, 120wPSU, swappable ODD
But it is being phased out and a more powerful spec will be introduced (with GT750M, iinm) shortly.
Depend on what type of games you play, the A45VS, 14R SE, Z480 could handle lots of game in 1366x768 resolution.
Negotiate kuat-kuat. For Dell, extend warranty to 3 years (~ RM250). Get a SSD (128G ~ RM300++)

Ideapad Z580, i5-3210M + Nvidia GT640M@RM2299, 4GB, 750GB(5400rpm), W7HB, white
Ideapad Z580, i7-3612QM + Nvidia GT640M@RM2299, 4GB, 500GB(5400rpm), freeDOS, white
Ideapad Z580, i7-3612QM + Nvidia GT640M@RM2499, 4GB, 500GB(5400rpm), W7HB, white
No reason to go for 15" if you still get HD resolution

Z480 & Z580 more or less has the same GPU, and you don't need to spend money on i7
