So on the PSU, I guess I will stick to non-modular ... since I would probably get the Corsair Carbide 400R which is non-transparent. As for the Mobo, if both Asus H77 & Z77 M-Pro versions cost 9.5k, I would much rather go for the Z77...
Also, on H77, I think it does have support for PCIe 3.0...