For months now I have been considering a new amp. There have been too many choices, but this thread will probably make it worse. Here is the info that you need: Room size 22x40x10 (8,800 ft^3) speakers are 7 driver WWMT with 4 Ohm imp. (min 3 max 5) the preamp is SS with 115 Ohm output imp. I would like an amp with great dynamic ability along with excellent mids and highs. I've been considering amps from ARC, Pass, Modwright. Please, if you have any ideas just a quick reply. My budget is up to 5-6K and used is preferable as I feel most of us Audiogoners take good care of our stuff. I am currently using a Wyred 4 Sound ST1000 which is a high powered Class D amp that does have great dynamics, but is not quite there for me in the highs.