I will frankly tell you that the Intel rig will be a little faster BUT with what you have already adding a FX8350 AND OCing will give you a solid machine. BTW, your Thermaltake 850 PSU is PLENTY. I have an Antec 750W gamer and is has plenty of power for my rig three. I have 4 fans running on the Corsair H100 (I'm a cooling freak), have the FX8350 Oc'd to 4.6Ghz(clearly uses more power but outstanding performance) and I have an EVGA GTX670 FTW running with an Intel 80G ssd for the OS and a WD Blue 500g hdd for the data. Also have 16G Of Gsklil DDR3-1866 ram in a CM HAF 932 Advanced case. The PSU never is overtaxed so you are in great shape with a Thermaltake 850. I have an Asus Sabertooth FX990 Rev1 mb with the latest BIOS so if you get the 8350 and need hints on BIOS settings for OCing the 8350 let me know.