Upgrading my HTPC for some gaming, what do you suggest Asus M5A97 Evo and AMD FX-Series FX-8120 $367 or Asus P8B75-M and Intel Core i5 3450 $387 to pair with my Sapphire HD5830 Xtreme 1GB GDDR5, 120 GB SSD and 8GB RAM playing on 40 inch TV.

 
I was originally thinking FX-4100 which was $60 cheaper than the i5 3450 but $40 more for an 8 core FX-8120 sounded good, but only made a $20 difference between AMD and Intel .

or should I just buy the 4100? PLEASE HELP