I have to agree with everything written above. I have kept these for 9 years while I have upgraded all of my other equipment in phases. I went from a McCormack amp (a bit tubby, indistinct) to Classe CAM 200's (great improvement, better control and treble details/layers). I went from a passive line stage to an Audio Research LS7 to a BAT preamp (VK30)- the driving ability of the preamp made a huge difference in adding weight to the speakers. I have upgraded all of my MIT cables, and am now playing with room acoustics, feet, etc. The Thiels continue to pay me back with each improvement made, meaning that they have never been the weak link in the system. I also agree that the service/support has been outstanding, the few times I have needed it. If you are looking for a certain upfront 'bite' and aliveness to your vocals and horns, the Thiels are one of the few that have it. It is a double-edged sword, however, since you can have them sounding too harsh and sibilant with the wrong equipment. Best of luck on your search.