I use an SG03, been using it for about 2 years going to LANs
@Curunen - how easily does the H50 fit inside it? Might look into getting one for my rig some day if it fits and cools well.
No problems so far; been running over a year (Nov 2009).
It's cooling an i5 750 oced to 3.2Ghz.
Airflow is intake through the front (both fans are hooked to the cpu fan header, though the top one has the H50 rad attached), with exhaust through the PSU.
Unfortunately my original PSU died back last Spring (corsair HX650), so I replaced it with the OCZ Modxstream 600W, which has the benefit of a 140mm fan - the corsair only has a 120mm fan, which for the only exhaust (aside from the graphics card fan) makes me think that was possibly why it died.
The only problem with the H50 is trying to get your hands in to do all the work - it is
very tight, and the front panel can no longer be removed due to the rad. I had a lot of frustration putting it together, although it was well worth it.
Benefit - cpu idles around 30*.
Edit: thought I'd mention - the input/output to the rad is nearest the open side panel, with the tubes bending in across the face of the rad, and back under the power supply.