Phanteks Enthoo ProM
great case for the money

Title says $3000, you say $2500, which is it?
I would wait for the new Nvidia cards to release, however this will do fine;
http://pcpartpicker.com/p/wdMxZL
I would still STRONGLY wait for the 1080 ...

short answer, no it wouldn't.
What is your budget, we can build a far better one that that pile of turd.

board will be fine.
nothing to worry about.

I would get the SM951 over the 950 pro, cheaper and a bit faster too, may not look as pretty but you can't really see them anyway.

This is what I would get;
http://pcpartpicker.com/p/TbbFwP
better than what you had and cheaper with a 4K panel too.

how much do you have to spend, what currency and where do you live?

that gpu wont fit and its not the best
clearly you don't need our help then...

GPU, there is a lot better for the money, also better to get one stronger card than two weaker ones.
PSU is bad quality, get a better one that won't kill itself.

Buuut, for that price point can't go wrong with a 970.