I'm looking at buying a relatively cheap prebuilt system. Would I be better served with the I7 3770 and a radeon 7750 http://www.newegg.com/Product/Product.aspx?Item=N82E16883229365
or would it be better to go with a slower amd 6100 but the better gtx 660? http://www.newegg.com/Product/Product.aspx?Item=N82E16883227449
Edit I'll be using it to play Star Wars: TOR
the 6100/660 would be better because gaming depends more on the gpu that cpu.
now since that is over; you don't need an i7 for gaming with since the hyper threading will be of no use and some folks report it even hinders gaming. and that 6100 is hinder the performance of the 660 in some games that utilize more of the cpu but are not heavily threaded - most games use no more than 2 thread with a handful using 3.
so i would like to recommend if you are going for a prebuilt then look for a decent priced i3 or i5 set up. yes, i said i3. regardless of what people may claim; a mid range card like a 7850 will be a great balance at playing BF3 multi player whereas a 7970 is load it too much. i had an i3 2120 for months and didn't have any problems gaming with a 550ti - the cpu never held me back, the gpu did.