The Oracle Delphi is an outstanding turntable - I traded my Denon DP-80 for one back in the 80s.
Mine was a Series III.
Setup is a little tricky because you need to get the suspension springs to work pistonically for best results, but it gets easier with practice. Earlier models used a counterweight under the plinth - rather than springs - to balance the turntable.
Later models look much the same, but have a broader subchassis, which has improved stability. One change I did make to mine was to replace the plastic armboard with a metal one, and that made a big difference.
I sold my Delphi to a friend who still uses it with my old FR 64FX arm. It still sounds great. Its weakness is in the lowest bass, which isn't a big issue for him in his system.
Later models look much the same, but have a broader subchassis, which has improved stability. One change I did make to mine was to replace the plastic armboard with a metal one, and that made a big difference.
I sold my Delphi to a friend who still uses it with my old FR 64FX arm. It still sounds great. Its weakness is in the lowest bass, which isn't a big issue for him in his system.