I have nothing but good things to say about the UB series boards. If you take the time to learn how to properly use gain staging on those boards and you're matching impedences correctly in your signal path you will have absolutely no problem with noise and it's a very useable tool.
The pre's are decent if you're looking for something that doesn't color the sound in any way and is relatively transparent. For the money it's not a bad buy but you might want to consider a Soundcraft Compact 10 as well. MusiciansFriend is blowing them out for about the same price ($179?) and they're a bit of a better board in my opinion.