Here is my .02 cents as firm believer in source 1st, I would trade the p6 with Ania and do what I can to get the P8....if that’s a stretch get it with their carbon cart, ( I have that combo)keep the fono mc as you won’t get much for it.
enjoy that combo for awhile, get to know it, then if you want to upgrade, then try a better cart like the Ania Pro or something else, listen to that thru your fono mc and see what you hear....its better, about the same or worse....my guess better.
THEN after that I would look at better phono stages.
Turntable/arm....then cart...then phono stage.....gives best bang for buck, you can’t amplify what you don’t get from your front end....source 1st.
My Rega with el cheapo cart kicks some ass especially for the money, I have more expensive tables that combo holds its own.