I voted for Chin Spin because I have a Chin Spin and my chin loves running like a maniac on it. It does need to be tightened periodically and is pretty quiet (except for when it starts getting loose again).
The only problem I'm having with the Chin Spin: My chin sometimes goes into crazy chewing moods, and for some reason she has chewed a bit of the powder coating off the edge of the wheel (once) and lately, she's been trying to reach the back of the wheel to chew the wood backing.
My chin is a little bit on the clumsily side, so if I had to replace my wheel, I would probably buy another Chin Spin to be safe.