As an extremely pleased SME owner, I think you have made an excellent choice with the 20/3. This is the highest-value table in the SME line up from what I can tell. I did do an extensive comparison between the SME 9" and 12" V arms and prefer the latter by quite a margin. You could consider looking for a good used 20/12. That should cost about the same as a new 20/3.
I have not heard the MC Anna. However, for another cartridge suggestion: I own and simply love the AirTight Supreme on the SME arms. This is an excellent combination in part because the Supreme was designed on an SME arm. You could also contact Albert Porter for his thoughts on this great combination.
I have not heard the MC Anna. However, for another cartridge suggestion: I own and simply love the AirTight Supreme on the SME arms. This is an excellent combination in part because the Supreme was designed on an SME arm. You could also contact Albert Porter for his thoughts on this great combination.