comparing three amps

I am trying to compare three different multichannel amps and not one dealer has all three. It's difficult to tell the difference between them when different dealers have them and carry different speakers.

The three I am looking at
Classe Ca-5200
Bryston SST2 C series this amp is 3 X 300
Krell TAS 5 X 200

All within $500 of each other in price

Problem is Classe dealer carries B&W, Focal
Bryston and Krell dealer carries Dynaudio