I don't know anything about the Clearaudio tables, but I owned the SME Model 10 with V arm for eight years and now have the SME 30/12 with V-12 arm. I have not heard the 20/3, but I read that it's sound approaches the regular 9" Model 30. If you have heard it and like it and since you will be using your V arm, I would suggest buying the 20/3. IMO, the suspended SME tables are very good platforms for allowing the cartridge to perform. I find them very neutral, though many disagree and think they are dull, slow, unexciting. My two SME tables have never sounded like that in my system. With the new power supply/motor controller, the table is very speed accurate, has great isolation and is built to be a "last purchase". You can also have every confidence in the quality of the company.
You might also consider the barely-used 20/12 on Audiogon. This could be an interesting alternative for a similar price to a new 20/3. The V-12 arm is incredible and I find it to be significantly better than the standard V.
