Sounds like a very nice setup , the power supply might be a bit too much unless your installing another 7970 , even then I think it's a little overkill. I have a ax760i in my system and it's to much , my ups says I'm drawing 216 watts so my psu fan never runs. Others here with more knowledge than me will tell you better.
But the rest of the components sound good to me.
Corsair 650D, MSI Z77A-GD65 , I7-3770k, Corsair H100i w/sp120 QE ,G.Skill Ares 16gb 2133 c9, Asus Blu-Ray Burner, Asus Xonar STX ,Corsair Neutron GTX 240gb ,W.D. black 1TB ,Seagate 3TB, MSI GTX 680 Lightning, Corsair AX760i ,Case Fans : Front : CM 200 blue,Rear : Corsair AF 120 PE