Speakers after GMA Europas

How about upgrading to a used pair of GMA Callistos or Rios, which can be usually had for $1500 or thereabouts, and pairing them with a used Blue Circle CS, which can be had for $700 or so? That would be a killer combo.

I agree that some more info is needed about the OP's room, as well as his priorities when it comes to sound. I'm with Shakeydeal - while the Vandys are great speakers for the money, I think they're outclassed by GMAs. In my experience, the first-order crossover of a GMA is of a much higher quality than the crossover in the Vandersteen 2s - the dynamics and detail are on a different level. If that's what the OP liked about the Europas, maybe he needs to stick with his original brand. In my experience, the GMA trebles also outclass the Thiels and Meadowlarks, as good as those latter brands are.

Daimbert - I have compared Devores with GMAs and to my ears the GMAs are a much more satisfying speaker if you're looking for transparency to the source, pinpoint imaging, 3-D sound stage, neutral response, dynamics and non-fatiguing sound. It's tough to match the results of the GMA's phase-coherent drivers and extremely high-quality crossovers, I think. The Devores, though, are probably just about as good in their own way when it comes to "musicality" and conveying emotion - they've got more of a "high-efficiency" sound to my ears, and they do have the advantage of being more efficient if you're dealing with very low-powered amps.

That said, you do have a pretty big room, so if you went with the Europas, pairing them with a sub would probably be a must. I think the recs for Vandys and Merlins also make sense, based on your room size.