My thinking is with the Acoustats is that they put out only as good as they are given. The best I ever heard was a set of 2+2 with ARC tube gear. That was back in the 80s.
I don't have a tube amp but that is the way to go. I hear that the ultimate is a set of KR SETs. BIG MONEY!!!
That said I have a friend with the Dehavilland SETs that put out 50watts.We are going to try them on my model 2s soon.
Rageorge: I think your 22s are more efficient than my 2s. I would audition 100 watt tube push pulls or better still 200 watt push pulls like a ASL Hurricane which can run in triode mode over 100 watts.
Personally I have never been a Mac (amp) fan.Too expensive.Good build quality,ok sound.BIG MONEY. Better sounding gear out there for less.But if you can "steal" it for a song, go for it.
The amp you have is a excellent choice for the Spectras,you may want to upgrade what you have and put the rest in a tube preamp/phono front end. This may make for a nice combination of strength and beauty.
It all depends on what you want and what you listen to.Personally, tubes are the only way to go.
These speakers only repeat what signal they are given, so the better the signal....