I use the First Watt F4's to power the 88dB Infinity speakers, quite low on power at around 20w - voltage gain into them is from 6SL7's. I've run them parallel for close to 50w, but even with a significantly overbuilt power supply, it's just not enough to really drive them - I could bridge them for more, but the power supplies don't have what it takes. Can keep on cranking up the power, but at some point it's just stupid.
I've also used an Adcom GFA-5300 that has some punch, occasionally fun to listen to. The 35w push pull EL34 from the Fisher isn't bad, and after an upgrade of speakers it will be more than enough.
A 2A3 SET by itself or buffered by the F4's for more current is what I'm looking to try next. Maybe it will be in the form of an Elekit TU-8900 with transformer upgrade so I can try 300B's at some point.
The room is indeed that deep, but lopsided. Half of the room ends 6' behind the listening position where a dining area goes back for the other half of the room. Half of the room is open on the side, and indeed a lot of space to fill.
I'm in South Austin, nothing currently available locally so a road trip is likely to be in my future. I'll audition some at the local retailer, check to see if the used gear place survived the pandemic.
My wife is indeed informed about WAF and doesn't show agitation because the sound is great. The decision to get rid of them for something that fits close to the wall made her happy. The La Scala's were frowned upon, the Cornwall still got a raised eyebrow, the Forte were smiled upon, even more than Heresy with a big sub in the corner. Can I really get away with 6" from the wall with them? I said "close to the wall", she heard "against the wall" in reference to placement. Currently the fronts of the baffles are 42" from the front wall so anything is an improvement. Forte yes, Cornwall maybe.
First thing is indeed to sell the other speakers!