painttoad,
I am extremely pleased with the 604's. I auditioned several different speakers in my home before purchasing and I kept going back to them. At the risk of starting a break-in debate, it seemed that it took some time for them to really open up. And they do enjoy much power. But when you turn them up, they really sing. It took me some time to get them set up right in my room. But the sound is very detailed. They have certainly told me what CD's I have that are well recorded and which aren't.

later,
simp