http://www.rme-audio.de/forum/ There is an RME Forum (FYI).
I love my UCX. I expect that you will too!!
You should be aware that in addition to the drivers for the device and TotalMix Software, you get DigiCheck.
http://www.rme-audio.de/en_support_techinfo.php?page=content/support/en_support_techinfo_digicheck I often launch 4-5 instances of DigiCheck and monitor all kinds of great things using it.
I also love the mixing in TotalMix and the on board FX are sensation! EQ, Compression, Delay, Verb.
I've even mixed recordings in Sonar bouncing them through the Reverb in the RME.
Fun fun fun