With 400 watts on tap, I can't imagine that your Primare wouldn't handle the Babies very handily.
My phono preamp is tube, but my control amp is total solid state. If you get into vinyl, then I'd say "yes" because you can get a nice tube phono stage for $400 to $800.
The whole Primare line is excellent. I don't think that you'd notice any significant improvement with the Rogue.
Perhaps a more important question is what cables are you using. Over in Reviews I compare the Analysis Plus Solo Crystal Oval 8 cables to my old Kimber 8PR. This presented a major improvement in resolution and was already using top-drawer electronics (Conrad Johnson).
So, bottom line from me at least, don't spend any more money on amplification right now. If a friend has Rogue, then trade out for a week or so to see if there's any real difference. However, make sure you're using great cables with those speakers. Analysis Plus isn't the only choice, but one of the ones with a very good price/performance ratio.
If you insist on upgrading amplification, look at Rowland with the Viennas. It's a match made in heaven. The Concerto intergrated will do the job nicely; however, any extra money spent with Rowland isn't wasted.
Finally, everything has to break in before you can reach any final judgements, even the cables.
Dave