Thor TA-1000 MK 2 pre and Aleph amps Os, 2, 5

I currently have an all tube system (Thor Audio TA-1000 Mk 2, Canary 140 tube monoblocks, Thor Audio TA-2000 phono stage, etc) but have always wanted to try a class A solid state amp for something different. I have heard the Aleph amps can be a challenge with some preamps. The Thor specs are: Input impedanace 250K ohms, Output impedance 400 ohms, gain 20db, S/N ratio -90.8db. Thats about all the specs on the Thor that I have in the owner's manual.

Any thoughts on whether the Alephs would play well with the Thor??? Or other thoughts on something I should try in solid state (had a Plinius SA-100 mk 2 once and loved it, but that was quite a while ago).

My speakers are fairly sensitive (Von Schweikert Research VR-6's) so the 30-50 watts on the Alephs shouldn't be a problem.

Thanks in advance for all the help!