Yes, i5-2410m and i5-2450m are quite the same, like 5-10% faster and that's not much. GPU benchmarks are here: http://www.techpowerup.com/164802/AMD-A10-4600M-Performance-Revealed-in-Infographic.html Looks like that will be my next buy.
Seems like You can order it already: http://item.gmarket.co.kr/detailview/item.asp?goodscode=258186654&pos_shop_cd=SH&pos_class_cd=111111111&pos_class_kind=T&search_keyword=
Yes, indeed the A10 beats i5 and also the 7660G+7670M scored...
GTx 680 TDP is 195W, so 2 of them are 390W+i7-2600K is 95W. So total of 485W+ other components(lets say u have many fans, HDD's etc)=50W. Grand total of 535W. And this is the peak power consumption. You have room for overclocking both...