Two other tube amp brand that warrant consideration would be Primaluna and Rogue.
I am a very happy Rogue owner (Stereo 90 Super Magnum). And Primaluna is pretty consistently praised. You wouldn't have many worries powering 90dB speakers with anything from these companies.
If you want to buy just one and be done, then I'd recommend finding amps you can audition. Best of all would be to hear them in your set-up. Dealer loaners and online dealers with good return policies do make this possible.
I am a very happy Rogue owner (Stereo 90 Super Magnum). And Primaluna is pretty consistently praised. You wouldn't have many worries powering 90dB speakers with anything from these companies.
If you want to buy just one and be done, then I'd recommend finding amps you can audition. Best of all would be to hear them in your set-up. Dealer loaners and online dealers with good return policies do make this possible.