Ok i have to add my 2 cents here
...
I have been using a RIO 1100 inline for almost 5 months now and have had: NO leaks from the unit, NO heat problem, NO pump failures, and NO vibration problems.
That being said, now for the deatils..
I originally took two brass fittings and force screwed them into the plastic molding and used plummer tape to seal it. That did produce a tiny leak that annoyed me. So I got out some trusty 50Grit sandpaper and grinded down the insides of both ends until the brass pieces fit just snug inside and used epoxy to seal them in permenantly. Never leaked a drop since.
Reliability: I was told when I bought it that RIO's dont like to be turned off and on quite often and that it would eventually kill them. So I have the thing running 24/7 and NOT attached any way to the PSU; just running the power cord outside to another outlet. Problem solved!
Heat: My system is all run inline and the unit is just warm to the touch. It does sit right next to my front case fan so that seems to do the trick.
Vibration: Easy! Used velcro to hamper any vibrations and attach the pump to the bottom of my case.
I have yet to try any other pumps in this system but considering that this pump is keeping my T-bird @ 1.725Ghz (150x11.5) at a nice 39-40C, I think it was a good buy.
Comments? Suggestions? Hate Mail? (j/k)