I owned a pair of Proac D-30R's for a while. Great speaker but needs some space to do its thing. The ribbon tweeter is very revealing and extended but set up correctly its wonderful. You have a lot of options with amps. I ran mine with a Pass Labs XA 30.8, Manely Snappers and an Audio Note Cobra. All of them sounded great but I will admit that the Cobra was my favorite. You don't need a lot of power to run them and I have to say they do sound better with tubes. If I recall correctly,Stewart Tyler (Mr Proac) voiced his speakers with the ARC Ref 75SE.