im looking to get a note book w/ a 1080p display for mid range gaming (borderlands 2, Crysis 3, BF3, TF2, Planetside 2, 1080p med/high settings, probably low for crysis 3). the 1080p Y500 is 879USD while the 1080p Y580 is 1349USD. their only difference is that the Y500 has GT 650m while the Y580 has a GTX 660m. is it worth the 470USD increase in price? i looked on notebook check and saw the 660m is 7 ranks (i think) above the 650m. is the Y580 worth it?