Phono Preamp?

+1 Zd. What is to be gained depends on what one seeks to gain.

What arm and cartridge are you using, and do you plan on upgrading either of those in the near future? With at least that information, some suggestions could be made.

Best,
Mike

Looking at the internal photo of your amp it appears you already have a phono stage with 'guts' similar to most $1K (or more) external units.
I wouldn't under-rate what you have.

I've got plugin phono cards for my Rowland preamp which offer outrageously good sound for their meager price ($400 option).

Don't part with any money before you compare to what you have (in your system if possible).

+1 Tobes. Well said.

Ditto...5k intergrated should have an excellent phono preamp...if anything the Rega 1 is probably the weak link.