Time for the Dynaco to go, Affordable Integrated or Separates for Wilson's Under $2.5K?

How about a Rogue Audio Spinx V3?

https://www.overtureav.com/brands/audio/integrated-amplifiers/rogue-audio-integrated-amplifiers/rogue-audio-sphinx-v3-integrated-amp

You are definitely in line for the best integrated amp that you can afford. Krell has made some great ones in the last 10 yrs or so that might fall into your price range. 

Recapping is the Golden Ticket for extending the life and preserving the performance of older amps. I have two systems, one in our main house and another at our cottage, both driven by Crown PS-200 amps from the early ’80s. About 100W per channel unbridged.

Acquired one for $85 out a church in Virginia and another for $125, both on Ebay. Dispatched them to AE Techron, the service mother ship for old school Crowns.

Both were repaired, recapped and bias adjusted, both bills under $300 (each) before shipping. Professional service all the way. One drives Onkyo towers with hi-output connected 125W REL t/5i sub. The other pushes vintage Cerwin Vega speakers with a small 1990’s era powered Jensen sub.

They sing. Some audiophiles look down on the professional grade bullet proof early Crowns, but when adjusted, with a good DAC on the front end, they present a great sound stage with plenty of headroom at adult home use volumes :)

Try a Yaqin amp from China for 500 or so.I have their tube buffer on the output of my sacd player and love it.You can get a model that's an integrated  and has a front mounted switch to turn it into a power amp.Very attractive amp plus you are getting 50 watts per channel.

For the money, imho, the Simaudio MOON 240i (around $2300 but you may be able to find a deal) is tough to beat. It blew away the rogue Sphinx v3 in my in home audition.  It’s worth a listen.