Hi there im looking for gpu for my rig

Intel I5 3470 @ 3.2 GHz
Asus P8B75M-LX
Elixir 4GB DDR3 1600
SSD EVO 120GB
1TB Western Digital Caviar Blue
2TB Western Digital Caviar Green
Cooler Master 334 Nvidia
SilverStone Strider 500watts ST50F Modular
Dell U2312HM


Budget : around RM500

Purpose : im not hardcore gamer but i do like fancy graphic when playing games

Monitor resolution : 1080

Games & softwares that use frequently : play PES2013 around just 2 hours every days but maybe want play popular games like AC, NFS, battlefield etc

Personal preferences : gtx750 , R7 260x or something similar

*want something that can play high setting or medium if not
*I just play couple hour of gaming and the rest just web browsing, movie, word and just idle with downloading stuff, so looking that have very low power consumption when not gaming or idle....
*right now just using intergrated intel gpu