I currently have a Jackie EC, but want to change over to an anglo - it will fit better with what I want to play.  I'm thinking of either the Wren2 or Phoenix concertinas.  Frankly, I don't see a difference in the descriptions of the 2 yet there is a large difference in cost.  I've also read that the Wren2 had a problem with the keys sticking, but maybe this new version has fixed that?     Any suggestions?