I built a system entirely around the Europas without ever first hearing them. On Roy's quiet recommendation I bought Edge gear -- the M8 amp and T-3 preamp. Marvelous. I learned a lot about high-fidelity with this setup. About a year afterwards, I inserted rebuilt Heathkit UA-2 monoblocs with NOS tubes. Heavenly!
The M8 emits 175 watts and had seemingly limitless current reserves; The UA-2's are 50 years old, dual 6BQ5's per side, pounding out a measured 16 watts per side. Huge transformers. Absolutely flat from 20hz to >20khz.
I am always conscious of the need to be careful not to overdrive the smaller amps, possibly damaging the tweeters, but I honestly do not suffer for realistic SPL's. They are really impressive. And this is a sound I can live with for a long time. I should add that there is a single Tyler sub good down to mid-twenties also in the system.
I also have Allen 75's (60 watts per side)and Sherwood S-360's (36 watts per side). These also are in the same league with the UA-2's.
By the way, I sold the Edge pieces and could not be more happy and satisfied with my sound.
Amps and preamps may come and go but I think I'll have the Europas a long time.