Mark sound like you have really nice balanced system,.Have a buddy who also has the PY7.It would be the one thing I'd swap out 9Rega 300/600?Origin Live 250?Eminent Tech?VPI 10 or 10.5 Memorial).You have excellent phono stage and cart and I have always been deferential to phono and cart and stage as opposed to more "balanced" parts of change but I think you have those bases covered.I would again call VPI and tell them about your problem (they may give you low cost option and general advice on deck).Another good resource I have found is talking to Bes Nivera at Music Direct who has heard most everything out there (and it's various combos).I would think that he could put in valuable 2 cents on PC,arm or other deck issues since he sells everything you have.
Good luck
Chazz
Good luck
Chazz