Well before you rule out all your options, there is a brand you might've forgot. Falcon made by Randy Falcon are some of the best I've ever played. I own 2 made by Randy and 2 made by Marc(Acadian) and I love my Falcons and would put it up against any great accordion. Hope this helps. -Cameron
I love all the accordions I own. I have a Heritage made by Rusty Sanner C# that is out of this world. My latest Acadian in Eb from 2010 is also a favorite (Marc has greatly improved his product, sound, volume and playabilty. No joke. Have a Martin in E that I love with all my heart as well.
I could go on, but I love all my accordions. Not all the same way, that's the thing. They're varying degrees of what I find awesome about each one.