I'v owned the MF 2300, and I now currently own the MF 2500A. The 2500A is much better then the 2300. It has much better detail in the midrange and its much smoother sounding. The 2500A is one of my favorite solid state amps. The 2500A is also better then the 2500. I'v not heard the Evolution 2000. But here's 3 posts about it. http://forum.audiogon.com/cgi-bin/fr.pl?aamps&974249055&openfrom&1&4#1I
