VPI Aries vs. VPI TNT III

My 12 year old Sota Saphire will not hold a steady speed anymore, and I've got the bug to upgrade. How do you folks compare the Aries to the TNT III? Is the TNT worth the extra money if bought used? I'm willing to pay a little more for a meaningful improvement. The reviews I've seen say that recordings that are old and not well recorded are unlistenable on the Aries. I highly value musicality. Thanks.