naw, your fine. the only big thing that is missing from the 960 is usb 3.0 and sata III, but if you need that, you can get expansion cards. shouldn't be a problem though.
I upgraded from a 920 to a 8350 because I wanted SATA 3 and USB 3. The 920 is still a great CPU so I might spend a few dollars and make an extra PC, just need a case, PSU, and a low end video card
If you want go a bit future proof and you are doing alot of multitasking then AMD's Piledriver FX processors are great for it. FX 8320/8350 beats i5/i7 in multi-tasking, streaming, 3D modeling(about 20% in Blender) and in some other things, comparable in games and cheaper than i7 3770k and a bit less than i5 3570k.