I use a Musical Fidelity A308 integrated. I haven't tried different amps with the Europas, but I love the MF, and I would guess it mates pretty well. It has plenty power. It also has very detailed, extended highs, which go very well the the Europas detailed, yet slightly soft sound. (soft to my ears maybe because I've justed switched from Thiel 1.6's)
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.