If good sounding analog is your second best source, I would:
Keep the arm, get a high-compliance MM or MI cartridge to go with it (Grado for example), and buy one of the belt tables that are being sold pretty cheap: Thorens, Dual, AR/Merrill etc. etc.
Most of those tables already come with a SME mount.
If vinyl is your first high-end source, you might choose to sell the arm and buy a used A-1 belt system on the internet, but you would be looking at $1,000-$1,500.
Let me know if I can be of any more help. I have had mostly belt-drive TTs, but at one time had one of the best Denon's a DP-80 which was right up there with my modified AR.
I currently am using an older Michel synchrodec with a Grace 707 arm and an old Pickering MM cart, and am happy.
If you want a cheap, but solid replacement for your TT, I have a Denon 1200 gathering dust. It has a cutout for the SME mount that your tonearm could be used on.
You could have it for $75, plus shipping.
I am a member, but my number takes time to look up. If that is important to you, e-mail me. I am oldtimer in audio.
This is my work e-mail
and my home computer is down at the moment.
best of luck.
bob charlanza
eastern pa
1-800-756-4237