I recently went thru the phonostage research and purchase process, it can be a blur! In the end I purchased the black ice audio F159 tube phonostage. Totally transformed my vinyl playback and then I upgraded to an old school Grace F9 cart with Ruby OTL stylus and wow….(I’ve a vintage Grace tonearm hence the Grace cart was a great match). I concur that your weak link is definitely that phono stage.
I honestly never seriously considered the mani.