Mauidj,
Any of the turntables you have looked at will be good. If you are nervous about the $20k, then spend less. What about second hand. For $10k you could get a second hand Micro Seiki RX1500 and a new Graham Phantom. Keep your Oracle as a benchmark. If you dont like the sound you can offload the Micro without losing much money if any. Put your original cartridge on the new deck then once you get a feel for the sound make a decision on cartridge. This is the least risk approach.
Any of the turntables you have looked at will be good. If you are nervous about the $20k, then spend less. What about second hand. For $10k you could get a second hand Micro Seiki RX1500 and a new Graham Phantom. Keep your Oracle as a benchmark. If you dont like the sound you can offload the Micro without losing much money if any. Put your original cartridge on the new deck then once you get a feel for the sound make a decision on cartridge. This is the least risk approach.