I have a V-Series by Vision Fitness. It is very quiet. I purchased it locally from a small sporting goods store. I agree, having the right shoes makes a big difference.
Did you go to the Search option above, and type in spin bikes in the Search Forums window? I know there have been quite a few discussions on this topic, but they may be over a year old. I bought mine when Cathe announced LIS.
Good luck!
Lisa