It's true, the Bottlehead Crack is amazing. Unfortunately, there is a lot of time and energy going into a topic that is heavily subjective. Tubes do color sound, but if you like the color, then you made a good decision. I listened to an odac and a schiit bifrost, and ended up liking the bifrost better. Then I'll probably end up with an o2 next. I don't care if the different products match, I don't care if they look pretty, and I don't care if I get a facepalm emoticon. If it sounds good, then it's money well spent. Right now, I'm very happy with my HD650s. Next I have to work on my Westone 4r's.