Ditto on the seasonic. I'm new to water-cooling and overclocking. I've been experimenting the last 3 months and I do love water-cooling.
However, for ease of use I would lean towards AIO's. Even after cleaning out my radiators and installing a filter... I have to keep cleaning out the cpu water block.
I did a poor job cleaning out one of the cheap 360 RAD which explained some of it. The rest I blame on the opaque white coolant. It's a pain.