I bought these CK hubs because of all the good reviews on them. It's sounds like the top two hubs on the market are the CKs and the Hadleys. Originally I had considered buying a wheelset with Hadley hubs......apparently less drag, but since I was deterimined to buy a used wheelset, CK won out because of the greater availability. Now I'm glad to hear that the CKs maybe a little bit quieter than the Hadleys. My buyers remorse is dimimishing a little bit. I'm so used to silently gliding through the forest with non-existent drag, so once I took the rear CK wheel out of the box and spun it, I had these unpleasant images of now having to grind through the trails, trying to overcome the drag, while scaring off whatever wildlife might be in the area because of the buzzing-clacking noise.
I guess the pros out weigh the cons on these quailty hubs, and I should just figure that there will be an adjustment curve that I'll have to go through to get used to these hubs. I forget that if I don't like these hubs I can always sell them and just get some XTs.