Hi! I am very close to purchasing a WA2 for my high imp phones (HD650 and T1) after many recommendations here on the forum However I am a bit puzzled: It seems to be a slight consensus that the WA2 doesn't work with low imp phones? Still, I read stuff like this: Often, the revered qualities of "fast transients" and "dynamic slam" are not positive qualities to me when it comes to headphone listening, simply because such attributes almost invariably lead to fatigue in monitoring situation in my case. Still, consider the fact that if one preferred low-impedance headphones like Grados and Denons, there weren't many tube amplifiers that offered themselves up for the task. But now, we have a tube amplifier that can be ideally mated with a plethora of dynamic low-impedance headphones, at a very attractive price. Does WA2 offer the ultimate standard in headphone listening? http://www.enjoythemusic.com/magazine/equipment/0709/woo_audio_2.htm Also - the very much respected Skylab seems to think that Hifiman HE6 is a quite good match with the WA2, but recommends the WA6 for low imp phones generally.. http://www.head-fi.org/forum/thread/497004/he-6-loaner-program/420#post_6882320 Since phones come and go, I'd like to buy an amp that will work with many different phones.. Anybody have opinions on this?