I went with the mobo because of the supreme fx audio which saved me getting a sound card. I could have done though as you say. The psu was really just to cover my back in case I ever want to SLI.
I did think about the 780 with the view to selling it on in a year from now for the new maxwell, but I thought I could even save a few more pounds than that by going for a 770. I guess whatever I get in the short term it isn't going to be worth water cooing. The outlay for a water block wouldn't be worth it.