Rega P5 w/Denon 103R what should I upgrade to?

your cart is capable of amazing things, that is not the source of your problem. I would look into getting a better table as a starting point.

I have heard good things about the 103R and the mods performed by Zu Audio. If you like the general sound of it but want more, perhaps you should consider the 103R Zu? I think the P5 is a good table and can support the 103R or 103R Zu.

I have the JD9 too. Have you upgraded the tubes? This will make a very big difference in sound and might be all you need.

Also, make sure your P5 is well isolated, balanced and set up correctly with the correct settings on the JD9. Cheers.

Tbromgard, what tubes have you tried that you like?

@viridian, you're right but by using a "heavy weight" in the back and a head weight up front you effectively change the mass of the Rega arm while keeping all it's goodness... or at least that what works for me. YMMV