Yea everything over a 4670K's is essentially a waste performance wise...
The 4960X does seem to show a bit more performance on some later games but that's about it and the things a grand flat.
But talking 4670K to 4770K is only a slight reduction of frame-times for ~$100 more. It's nice if you have the cash to drop but not really worth it otherwise.
Looks like a great build.
CPU:AMD 8350 8 core @ 4.4(O.C.)||Cooler:Cooler Master Hyper 212 EVO
GPU:Sapphire 7870 XT (Tahiti)+Sapphire 7950||Harddrive:500GB Hitachi 7200 RPM, 120 GB Plextor SSD
Ram:2x4GB PNY @ 1600Mhz||PSU:OCZ 750w-ZT series||MoBo:Asus m5a97 le 2.0||O.S.:Windows 8.1 64
Case:Thermaltake V3 Black Edition||Screen:40" LCD-RCA