I have been enjoying a pair of the Rhythm Revelator Signatures for about 2 weeks now. I had Lee Taylor make the cabinets and external xo boxes- took him about 6 weeks to complete my order but his quality of veneer and construction is outstanding (his cabinets use thicker MDF than outlined in the North Creek plans and an integrated port/rear access panel.)
I would not call myself a DIY'r. I have been wanting new speakers for several years and I auditioned Vandersteen 3 Sigs (loved them), Dunlavy IV's, Proac 2.5's, Verity Audio, a bunch of different Dynaudio's and Audio Physics. While almost all of these speakers were really enjoyable I just balked at the price (except Vandy's)
Looking at the North Creek site was pretty convincing. I liked their emphasis on integrating top quality drivers with high end crossover parts and design. I thought their design goals for the Rhythm matched my criteria for new speakers - full range, great imaging and a touch of euphonics. I also read a lot of reviews on the web.
Eventually it came down to the Rhythms or the Vandersteen's. I bit the bullet and went for the North Creek's for a change (I've had Vandy 2ci's for 8 years.)
I have to say I'm in the zone right now with these Rhythms. They've motivated me to buy a lot of new music. They have started to break in and I've got the placement down in my room. They are exactly as represented on the NC site. Imaging kings. Great clarity, non fatiguing and musical, and full range (except that the 20-30hz range output is pretty quiet thus far.) I think they are more natural sounding than the entry level Verity's, less bulky than the Dunlavy's and Vandy's and throw a bigger soundstage than the Dynaudio's.
I expect these things to continue to improve too!
I would be glad to answer specific questions about the speakers. My system can be viewed in the Virtual System section.
Overall, however, I can say that they are a steal for the price (3k) and I will probably have these guys in my system for a good long time.
Go for it.