I also went with the corsair 1600 psu, most I have seen in watt output is 650ish
Temps flying in P3d, the max I have hit in stock is about 70 (with OC I was up around 90 at times).
I hold around 30 fps, but everything is maxed out and even when the FPS drops (low 20's) it is still smooth.
It is so far, set and forget for me.
I had MSI in my old 8700k system but after looking at reviews I went with the ASUS board and I am very impressed. I did do a Bios update asap do take advantage of the newer XMP profiles.
As Landon said go with the brand you trust.