If you plan to mount the psu at the front like that, you will have a gaping hole at the rear where its supposed to go.
I have a 390 in my r5 and I went with 2 140mm at the front, 1 at the front bottom (where you have your psu drawn, although I'm not happy with that) and 1 exhaust at the rear 140mm. I have the nd-h14 cpu cooler also. Temps on gpu don't got above 63c.