Everything looks good, the CPU can still get things done since games are more heavy on the GPU side, especially Crysis.
Good amount of RAM, 8 is sufficient, you got 16.
Quality PSU by Seasonic.
I'd definitely change the GPU. On budget I recommend a 7870 XT (Tahiti), if you can push it, a 7970 Ghz.
If you can, this is by no means necessary, I'd get a i5 3570k with a Z77 mobo and a fan. Again, not really needed, yours can hold it till Haswell.
Thanks for the quick response. I'm just wondering how much of an upgrade I could expect to see (in-game) if I did pick up the 7970 ghz, or is that kind of a hard question to answer?
I compared both the cards and I can see considerably higher numbers on the 7970 but I don't fully understand all the technical specifications so it doesn't mean a whole lot to me.