go exhaust every time, put a fan filter on the push me fan to prevent dust building up on your radiator and reducing cooling ability.
Or just scrap the whole thing and sell it and buy £30 air cooler and watch your CPU temps drop by about 8c which is what I did......
Lol, not an option, but thanks for the help, i shall stick with intake, not much dust on the rad, do like the lower temps too.