CPU & GPU Advice

Okay, I'm completely new here so apologies if I've missed a section and this thread is in the wrong place.

I've got £600 for a new computer, and I'm not quite sure which combination of CPU x GPU to get.

Here are my options:

AMD FX 8120 with Nvidia GTX 660 Ti

Intel i5 3570K with Nvidia GTX 660 (Non Ti)

I'll be open to any other suggestions that'd better my purchase, I'll be getting this one brand new from a UK custom pc retailer. (despite the category name sorry!)

I'm not quite sure if the 8120 would bottleneck the clocked version of the 660, and what better performance I'd get if I opted for the intel with the standard clocked GPU.

I'm looking to play games on a 1920x1080 resolution on a single monitor, I'd like to be able to play graphic intensive games on high to ultra settings with the possibility of fraps recordings (I'll get a fast HDD or an extra SSD later if necessary).

Thanks very much!