Just speaking from personal experience here. I would not recommend the udac. Anything else in that price range is better IMO.
From what I understand, the udac is not much better than the cdp 8. (have never heard the cdp)
"This graph was taken with the Audio Precision SYS2722; the Miller Jitter Analyzer gave the same spectrum and calculated the jitter level to be 3.13 nanoseconds peak–peak. This is one of the highest levels of jitter I have measured, and about 20 times higher than in the best products I have measured."
Edited by Llloyd - 3/21/12 at 5:02pm