You'd think I would have been able to remember it was a CD3k. Anyway, I thought the CD3k/Woo5 combo sounded pretty good. I had not spent much time with either before, but I thought the Woo5 did a nice job of taming some of the CD3k's highs. The Woo had a satisfying, liquid-y sound; very tubey I guess. That tube lushness was nice to hear, especially as my gear is almost all ss. At the same time, I thought the Woo sounded a little sluggish on the bottom end. Overall though my impressions were very favorable.
The build quality is very good, and I like that the amps are made in NYC. But I did not like the volume knob and pot. They felt cheap to me.
I guess it's "competitively" priced, but it's still pretty damn expensive to me, especially when you factor in the 300b costs.