Marco,
I have never heard a Rock Reference, But I have a Rock 3 and lucky enough to have a Rock V. Properly set up, these are some of the best sounding TTs ever made. The tone arm dampening system may turn people off, but is very easy to use. The Rock Reference is reported to be an outstanding TT. If I were you I would get the Rock Reference. It is an incredible TT and very rare. You may not be able find another one. The Sota may be more available at a later date. When I got the Rock V, I put everything I had to get it. I, then slowly brought up the rest of my system, much like you are thinking. I have never, regretted this. Best of luck with your decision.
I have never heard a Rock Reference, But I have a Rock 3 and lucky enough to have a Rock V. Properly set up, these are some of the best sounding TTs ever made. The tone arm dampening system may turn people off, but is very easy to use. The Rock Reference is reported to be an outstanding TT. If I were you I would get the Rock Reference. It is an incredible TT and very rare. You may not be able find another one. The Sota may be more available at a later date. When I got the Rock V, I put everything I had to get it. I, then slowly brought up the rest of my system, much like you are thinking. I have never, regretted this. Best of luck with your decision.