What are you intending to do with this system? If its main purpose is gaming, an i5-3570K would work just as well for less money (see differences between 2500K and 2600K for examples
). Also, do you live near a microcenter?
If so they always have the cheapest processor prices around and you can take $50 off a motherboard when purchased with a CPU. In fact they sell the i7-3770K for $290 also (plus tax).
Main: i5-3570K, ASRock Z77 Pro4-M, Asus GTX660 TOP, 120 GB Vertex 3 Max IOPS, 2 TB Samsung EcoGreen F4, 8GB 1600MHz G.Skill @1.25V, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Seagate SSHD, 8GB 1866MHz G.Skill, Hand-Built Wood Case