I'll throw in my .02 as an owner of a MMF-7. I bought the table used and have been pretty satisfied with its performance. I have seen many Music Hall owners post that they are very satisfied with them and don't plan on ever changing out their tables. That being said, the analog bug can bite pretty hard and I have already begun to plan for a table upgrade in the future. This brings me to one issue with the MMF-7. There is really no appreciable upgrade path. I have rewired mine and changed to Vampire RCAs but that is about all I can do with it. So I would be looking at changing the table, arm, and probably the cartridge as well.
FWIW, the table came with a Shure v15vxmr and it does a decent job with my fully modified EAR 834P. I have not tried other cartridges yet, but if memory serves me you need to stay with a low mass cartrdge with the project arm so I think that many low output MC cartridges are not a good match on the Music Halls.
I have not used one, but at least with a Rega it seems that you can usually modify the arm and use it on many higher quality tables.
Something to think about.