I'm posting this here, as the headphone section doesn't get much traffic. I'm part of a prototype group for the new Stacker II headphone amp designed by Alex Cavalli. We have been working on this amp since the end of last summer. Having built some of Alex's designs, I have great faith that this one will be very nice. Here are several links to more info if anyone is interested.http://headwize.com/ubb/showpage.php?fnum=3&tid=7342
http://www.head-fi.org/forums/f6/stacker-ii-next-generation-hybrid-318479/
http://www.cavalliaudio.com/