Hi Nichomoff,
I think your proposed upgrades are all worthy. I have a P5 and have upgraded it with a Groovetracer subplatter, Delrin platter, counterweight and Rega white belt. It really has transformed the sound of the P5 for the better.
I would start with the subplatter, which would make the most dramatic difference, followed by the speed box.
Look into ditching the Ortofon Blue for a better cartridge. You could go Bronze or Black, or better yet, a Dynavector cart, which matches well with Rega arms.
Good luck!
I think your proposed upgrades are all worthy. I have a P5 and have upgraded it with a Groovetracer subplatter, Delrin platter, counterweight and Rega white belt. It really has transformed the sound of the P5 for the better.
I would start with the subplatter, which would make the most dramatic difference, followed by the speed box.
Look into ditching the Ortofon Blue for a better cartridge. You could go Bronze or Black, or better yet, a Dynavector cart, which matches well with Rega arms.
Good luck!