Like you, I was an owner of Yvette’s before I became a dealer by trade three years back. I paired them with T+A electronics (who I now deal for), and the pairing was very good. Wonderful harmonics from the T+A, and exceptional control of the speakers. The stack used in particular is the T+A A 3000 HV amplifier and optional PS 3000 HV power supply. I owned these amps before becoming a T+A dealer, and they are still my reference amplifiers to date.
Wilson is often paired with Audio Research at shows, and the pairing typically sound great. But if you ask me, I’d pick Simaudio over Audio Research. The Simaudio has a really nice and silky top end to their amps that work really, really well with Wilson. Just a bit less harmonic than T+A, but the tonal balance is quite beautiful.