Cartridge Upgrade for Rega P-25 Table

I have a fully modified/upgraded P25 and have used many different cartidges, all with pretty good success. You say no price range, so it's kind of hard to narrow down. I'll list my suggestions from expensive on down:

Lyra Delos (overkill for this table, but very nice)
Dynavector 17D3
Sumiko Blackbird
Dynavector 20X2L or H
Audio Technica AT150MLX (currently on my table and WONDERFUL)
Grace F9E (my favorite moving magnet)

Your Fosgate will drive almost anything out there, so no problem on lower output MC.

I have a couple of Denon 103D's that SoundSmith redid. I also have a Zu Audio/Denon 103 currently on my Oracle Delphi MKIV.

I did try one on the P25, but really didn't like it that much. I can't remember why? Maybe just a poor match or maybe it was my mood that day :-)

The 17D3, (or a 17D2MKII) would be an excellent choice.

If you can find a Heed "Orbit" Power Supply that will work without swapping out the motor. I have one on my P25 and it works very well. It's designed for the Rega tables.

Glad you like the 17D3, it's great cartridge. You could try BlackBird Audio for the Orbit Power Supply. They are a Heed dealer:

http://www.blackbirdaudio.com/Blackbird_Audio_Gallery/Heed_Components/Heed_Components.html