Can you find a barebone package that has the i5 2500k instead?
Its cheaper and has almost equal performance with 2600k for gaming.
If you want the most out of your money now, get an i5 2500k, 500 or 600 watt PSU and HD6870 or GTX560ti for 1080p resolution.
Only go with AMD AM3+ if you plan on changing to Bulldozer 8 core which will come out by the end of september or early october.