I use a DC5000 that I control return flow to have zero noise and zero bubbles. Sort of adjustable herbie :)
http://forum.reefangel.com/viewtopic.php?p=28750#p28750
I have a few of the Jebao ones I got to test if you are interested.
I got DC3000, DC 5000, DC6000, DC9000 and DC10000.