Hawk28:
I have not heard the Primaluna so cannot contrast the Rogue with them. Between the Rogue M120s and M150s, definitely go with the M150s. I have the Rogue M180's. If you go with the M150's someday you should consider the upgrade to M180. The M150s are faster, quieter and run cooler than the M120. The M180 is significantly faster and quieter than the M150.
I got my M180s with Gold Lion KT88s. I replaced the small tubes with NOS RCA 5751s and 12AU7s. I tried NOS Telefunken 12AX7s and wanted to love them because I know how rare they are, but I had to go with my ears, and for me that meant the RCA 5751s. Going from the 12AX7 to the 5751 was like going from ultralinear to triode all over again in terms of system quietness.
I also have a Rogue 99Magnum preamp. I replaced the 6SN7 tubes with NOS RCA 5692s.
The Rogue M180s suit me because I like a lean, articulate, fast bass along with the midrange and upper frequencies of tubes. For me the Rogues are a good balance of those qualities. Refining the sound with a little tube rolling is to me a must, not only for the Rogues but for any tube gear I've heard. The new, stock tubes just don't do it for me.
But I want to add that the above works for my tastes and my system and should be taken in that context only.