under $1,500 will be easy unless you buy retarded things that won't help at all like a $200 case or $300 mobo like some people do
http://pcpartpicker.com/p/W8r8zyif you need an optical get a usb one imo... I don't know anyone that uses one anymore unless they are reloading there computer pretty much
also pick os of your choice around $100
probably want a cpu cooler as well hyper 212 evo is always good and like $30
this will be WAY overkill for wow but will last a long time. if you play fps they seem to be more cpu demanding it seems so upgrade to the i7 if you can afford it (which it sounds like you easily could by your budget)