Pump pulling from CPU does it make a difference?

[bluehaze]

New to watercooling, picked up a bunch of stuff to try it out.

Have a magicool elegant 360 radiator
Koolance 350 cpu block
ddc 3.25 with an xspc top
ek waterfall res
Bitspower compression fittings for tygon 1/2 id 3/4 od

The cleanest loop for me is pump>rad>res>cpu

Is this bad? If so what is the best way to route it?

This is on Evga Classified with 17 920 d0.

Also was thinking of getting 2 gtx 295 or 3 285 and adding those to the loop in the future, would it be too much for 1 360 rad and 1 pump? I prefer to keep the build clean so only want to use 1 rad if a normal 360 rad is not able to keep up would something like the monsta 360 be up to it? Don't really care about the price of it if it would help that's all I care about.

Also using Thermalright 1600 rpm fans because I had 2 already so just purchased a third haven't decided what fans I will end up running but these are quiet and push alot of air for the lack of noise they produce so I like them, although haven't heard them through a radiator yet.

Edit: Also using Primochill PURE coolant for convenience, not sure where to get distilled water, can go with distilled though if it will make a significant difference in temps?