Can someone help me with building a computer for 1500?

I have around $1,500 to spend on a desktop that i want to build. I want it to have the intel i5 2500k unlocked quad core, and 8 or 12 gigs of memory. i was goona go with the i7 2600k but people tell me that its not necessary for gaming and the intel i5 2500k unlocked quad core is the way to go. SOMEONE HELP ME LOL. Im building it to play games like World of Warcraft on ULTRA setting.