I'm a newbie to headphone amp and considering to get either Audiotailor Jade (not sure whether this still available) or Woo WA3 or WA6. My goal is to get nice warm sound from the amp to use with my Etymotic ER-4P or Sennheiser HD600. Price wise Audiotailor is the more economical solution although I want an upgraded version with Alps pot, infinite cap, etc however after reading this forum I think the Woo audio products have better built quality. I mainly listen to Jazz and Audiophile recordings. Wondering if somebody have experiences these products and could describe the sound signature of each products above.