I paired my Cary SLP-98 tube preamplifier with the following amplifiers, successfully:
Quicksilver Mono 120 (my current monoblock tube amps)
Cary V12R (stereo tube amp)
Cary SA-200.2 (stereo solid state amp)
Inspire Hot Rod (stereo tube amp)
All combinations sounded nice for their perspective power ranges and related speakers used. My feedback is not from specs, from real use.
re: Pass Labs. Nelson indicated to me a year ago he has several customers running the SLP-98 tube preamps with his .5 and .8 version PASS amps. He indicated this is a popular combo as well, fwiw.
The SLP-98 preamp combo with the Cary SA-200.2 was very nice, smooth, dynamic, nice sound stage, plenty of power. With the right Interconnects, it was a nice combination for solid state in my setup.
With your Ryan 630 speakers and Nomex drivers (I’ve built something similar), you could pair them up with a nice Rel subwoofer for added bottom end and spend your money on a "musical" amplifier, tube or solid state. I’d guess you are searching for something more, what?
A few come to mind:
Tube: Quicksilver Mono 60s (tube), Quicksilver Mono 120s (tube)
SS: Cary SA-200.2, Pass X30.8, PASS X60.8, Van Alstine FET 400, Parasound JC5, PS Audio BHK 250.
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Your preamp is sensitive to tube, cap, and interconnect changes.
Two questions:
-What brand (new or NOS) tubes are installed in your SLP98 now?
-What do you not like about the Primaluna Dialogue 5 pairing now?