Seems like OP might have money to burn for a Titan X Pascal.
I'd wait for the 1080TI when / if that ever happens. The Titan X is ridiculously expensive and not really as readily available as the 1080 is, and the 1080TI when / if it becomes available.
I was really looking for two 1080's, I'm aware that the 1080ti is coming out soon but I am really looking to buy out now. Would this be a good build?
You could buy everything but the GPU and then wait for the 1080TI to drop, just a thought. That build looks pretty good - you don't need a 1050W PSU, a solid 850W should suffice even for dual 1080s since the 1080 only puts out 145W.