[TOGA]

Hi,
I am here to assure you that ARC tube preamp will work fine with wide range of SS amplifiers even one with input impedance so low that it is on the lower limit recommended by ARC.
With my Ref40 pre amp. here are amp that worked very well, no obvious mismatched issue.
it depends more on your sonic preference, your choices of cables, speakers, accessories.

1. Moon W7M, fantastic power, open and airy , punchy and rock-solid bass.
2. Pass X350.5, XA160.5, very musical as well.
3. Vitus class A
4. Constellation Centaur Mono. < very good low level details. I think of my first experience to Nordost cables with this amp.
5. Mcintosh MC402 < relaxing but quite narrow dynamic contrast. think Night Mode engaged.
6. Gryphon Memphisto , highly musical with power to spare despite power rating.
None of them had/have electrical matching/gain/ issues.
So choose based on what you like. Currently I use Gryphon Memphisto and I have everything that I want and should not replace it for years to come.

Toga