I asked Totem to recommend an amp for the Sttaf, but apparently they don't like to name specific brands. Here's their reply:
Do you know what tube products your dealer carries? Primaluna? Rogue? Jolida? Cayin? Even if you decide to go with SS, I strongly recommend listening to the Sttaf with tubes. I also recommend bringing your own music to the audition. Bring something that you know intimately.
We recommend a minimum of 50 watts SS and 20 watts TUBE. We obtain numerous inquiries about amplifier recommendations, and although superior combinations do exist personal taste does plays a large role in determining the perfect match. We recommend contacting your local Totem dealer to arrange for a personal audition of various electronics paired to our loudspeakers.Personally, I'm a fan of tubes. To my ears, they sound more realistic and tend to be smoother and less fatiguing. At 88 dB efficiency, I really think the Sttaf need more power than 20 tube watts. 50 watts is a better baseline. There are plenty of options in your price range.
Do you know what tube products your dealer carries? Primaluna? Rogue? Jolida? Cayin? Even if you decide to go with SS, I strongly recommend listening to the Sttaf with tubes. I also recommend bringing your own music to the audition. Bring something that you know intimately.