When I went with Europas, my amp was a Pass x-250, sound was awesome. I wanted to downsize and take a bit of equity out of my system, so, I went with a Manley Labs Stingray (50w tube). Most won't believe me, but bass improved, soundstage opened up huge, I lost a little of the high frequencies, but the trade of was worth it. I can't imagine needing more.
GMA Europa owners, what amps do you use?
I am in the process of evaluating the Europas with a 45 Watt tube amp and a pair of solid state monos. After preliminary comparisons, I can see strengths of both approaches. I am wondering what other GMA owners are using to power their speakers.