Need help on what to choose for first gaming rig

Ive been choosing parts for my new gaming rig and and having a bit of an issue with which mobo and cpu to pick since the new IB came out.

So far i've chosen:

1. I7 2600k
2. Asus P8Z68-V Pro Intel Z68 1155 Motherboard
3. Cooler Master Silent Pro Gold 1000W Power Supply
4. Cooler Master HAF X Flagship Full Tower ATX Computer Case RC-942-KKN1
5. EVGA GTX 570 2560 mb
6. Corsair Vengeance 8GB (2 x 4GB) 1600MHz DDR3 240-Pin Desktop Memory

Now Im stuck whether i should get a new i7 3770k IB with a z77 board or if I should stick with the 2600k.
I will mainly be using this for gaming and partially for work.

Any advice on the rest of my specs would be appreciated.