My Revel Studio2 speakers are so outstanding, I can't think of any improvements. This was one of the single best purchases I've made of all time. They are not picky with amp selection but the better the amp the better the performance. They are incredible speakers. If there ever is a new speaker, I would buy it in a heartbeat, no audition necessary. Kevin Voecks is a genius.
http://www.stereophile.com/interviews/390voecks/
http://www.stereophile.com/interviews/390voecks/