I am now seriously considering amplification after visiting a friend who has a number of AMP's and headphones. The one I liked most was his "intruder" where I could hear the most detail, however it wasn't as good as the $1500 Lehmann amp the HD650's were connected to when I auditioned them and I am trying to find something similar.
I am wondering if some kind souls might be prepared to help me with an experiment. In the Audition I used Celine Dion - River Deep Mountain High from "Falling Into You", which was on CD. In the first 30 seconds of that track, there are sections where there are backup singers, and using my STX and 2 of the lower end (relatively speaking) amps I tried today, I can barely hear them, but on the Lehmann Amp they were crystal clear. I would be interested in anyone who had that track and an AMP to tell me if they can hear it (really clearly) from their amp and which amp they are using.
It's the only track I have such a clear reproducible experience with.
It is best to have the same source when you are evaluating an amp, so limiting other factors.