you need to provide more info regarding when you are buying, where you are buying, whether your budget is after HST or before HST, what parts you dont need, and what games you are planning to play
also note, if you have not tried to play on 3 screens and found out that you dont like it or you perform worse on 3 panels,do not bother with triple panel gaming. its a gimmick for the most part
generally, this is what id get
http://ca.pcpartpicker.com/p/1HrlA
given the fact that new GPUs are supposedily going to be released within a few days, i left the GPU slot out