I am looking for a new tube headphone amp. The amp I'm most interested in the Woo 6.Here is a link. http://www.wooaudio.com/products/. Does anyone here have any experience with these fine looking amps? I am going to be driving AKG K701's so if anyone has that combo I'd be interested to know what you think. Have you had any problems? I listen mainly to jazz and classical. Thanks.