What do you think about this build?

Solution
are you planning to oveclock on it? if you are, the prime z370 is a bit lacking.

for seriously oc, the most budget friendly board is asrock z370 ex4, very solid vrm.

otherwise, i think you are better off with a 8700 and a b360 board with a cryorig h7/ cm hyper 212, and upgrade the 1080 to 1080ti.
are you planning to oveclock on it? if you are, the prime z370 is a bit lacking.

for seriously oc, the most budget friendly board is asrock z370 ex4, very solid vrm.

otherwise, i think you are better off with a 8700 and a b360 board with a cryorig h7/ cm hyper 212, and upgrade the 1080 to 1080ti.
 
Solution
If you play FPS games like CoD WW2 or any of the Battlefields, I'll see you there. PSU prices always fluctuate and can be found cheaper but regardless, it's quality. Ram prices are dropping as well as GPU. Make them your last buy.