Well, I went and did it. I'm now on the list at Decware to get a Zen Torii Mk. V. (I'm guessing it'll be a year, at least, before I actually get it.) If you're not familiar, the Torii is a zero-feedback, push-pull circuit designed to behave -- or at least sound -- like a single-ended one, while putting out 20wpc. I looked at all their different models, including the SETs, and landed on the Torii as the best fit for me. I also looked at Icon Audio, the Line Magnetic components, Cary Audio, etc., but I kept coming back to the Torii. I can't say I'm excited, exactly, to hear it with my Stirlings; that's too far off in the future. But I am looking forward to hearing it.
In the more near-term, I also upgraded my digital front end. I've been using a bel canto streamer with the Mac preamp's DAC module. That module is no slouch; it's a fully balanced design, using ESS chips. But, I've always wanted to try an R2R DAC. I like what I hear about them. So I've got a Denafrips Pontus II on the way. Pretty excited about that.
Also on the way is a Hifi Rose RS250 streamer to replace the bel canto. Frankly, that's mostly about the user interface. I don't use the DAC in the bel canto, and I won't use the one in the RS250, either, so neither unit is contributing anything to the sound. (OTOH, I am stuck using an RCA coax connection from the bel canto to the Mac pre, and with the new stuff I can run USB from the RS250 to the Pontus, and a fully balanced analog signal from there to the Mac.) Mainly I wanted something with a display that shows track information, album art, etc., and the RS250 has a nice one.
So, my Stirlings will soon be getting fed better, and a while down the road, maybe quite a bit better. Here's hoping they reward me for it. 😁

