Recommend a good tube power amp in the 100 wpc range for under $4k

OP: 

This is the data point I was mentioning, right after the word "minimum." This tells you that these speakers don't need 100watts and would be fine with a tube amp.

Impedance: 8 Ohms nominal (minimum: 5 Ohms, from 150-250Hz)
https://hifiplus.com/articles/fyne-audio-f702-floorstanding-loudspeakers/

Hi Mike;

I think this has been well covered here but my 2c worth is that bi-amping is a great way to have imbalance in your sound and your checkbook. "On paper" bi amping seems like it makes sense but in your listening room you are going to have a sonic disaster.

If you are married to the idea of 2 amps use matched mono block tube amp but NOT bi-amping. Tubes are always welcome as they produce wonderful warm sound and a LOT of volume.

Personally I’d go with a good used Audio Research stereo tube amp with under 1500 hours on it. They are built like tanks, sound amazing, are much more affordable than the new ones, and don’t loose value if you choose to trade up. (Of course sound is a preference like blondes vs. brunettes or French wine vs. California wine. Only you can choose what "sounds best") One other thing- ignore anyone who makes fun of what YOU like.

I have a great used Audio Research VT130 tube amp for sale for sale 3.5K It was my favorite "large format" amp until I put my hand up on a pair of Ref 250SEs (8K 1900 hrs plus nearly $500 in FedEx freight. Ouch!)

Remember the KISS principal- Keep It Simple, Stupid!

Hope this helps!

OK folks, you’ve convinced me to reconsider.  I do not want to modify the speakers,  so it appears—as is often the case I found in my nearly eight decades—that the simplest course of action is most often the best answer.  I will, once I convince the wife, opt for a single tube amp; if something convinces me that I don’t have enough power, which is most unlikely, I could always buy a second identical amplifier or go to monoblocs.  I know there are LOTS of options out there.   Given my satisfaction with my Rogue preamp, I am considering either the Rogue Stereo 100 or the Atlas Magnum III and also the McIntosh MC 275 MKII, but the Cary CAD120S MKII also has caught my eye.

Any recommendations in the roughly $5000 and under range would be most welcome.  I prefer new equipment, preferably not made in Mainland China, as I don’t like supporting totalitarian regimes engaging in nefarious activities.

And, once again, thanks to all for your comments.  They have been most helpful.

Mike

thinking about the valid comments regarding volume...

Ric Schultz (Tweak Audio) makes passive resistor volume controls that go between the amp and interconnects. You lose the ability to adjust volume from disc to disc but...

Look at Art Audio, Tsakadiris amp as well.