What are you trying to achieve with any proposed "upgrade"? The Rega setup you have is very balanced and a good performer. To do significantly better would require a substantial investment. But that would then trigger a new preamp and probably new loudspeakers plus a new power amplifier. At that point you'd have to get acoustic treatments and power conditioners. And don't forget cables! Like I said, your existing analog setup is very balanced.
New preamp or up grade my cartridge and or phono amp?
I have an Emotiva XMC-1 with a Rega P6 TT a Rega MCFONO phono amp and a Rega Ania cartridge. If I'm running the Emotiva in the "reference mode", would it make more sense to up grade the cartridge and phono amp (maybe even the tonearm) or add a new preamp with a HT bypass