bought a 700 w psu when this setup uses 310w max, (500w) is more than enough, then you buy a z270 mobo wich is mean for overclocking paired with a processor that can't oc and you put a watercooler on it? all that misused money could have been put into buying a 7600k with a decent air cooler keeping the temps in more than safe area even when overclocked alot (4.5 ghz easy)
only reason this build seems logical is that you future proofed everything and are planning to upgrade the cpu later, overall a good build but the balance is a bit off, good cable management and the colours look good and balanced