Oh, really sorry for putting you through the trouble, I do not own a Lyr 2, I was just trying to decide which one to go for. I've looked through more reviews and I'm leaning towards Project Ember II or Sunrise III, as for Lyr 2, many people said it doesn't quite offer a tubey sound so that's why I thought it's not a good idea. I've asked about the HD700 because I've heard it has weird treble spikes and it might pose a considerable problem. So I was curious about a review because I might go for either that or T90, have found some decent offers for both, but the HD700 isn't returnable. Anyways sorry for that offtopic and appreciate the tube suggestions, I'm gonna look into a pair of 6n6p as I've heard it's pretty close to 6n30p for much lesser money (or a single one I guess, I don't know if they're sold as a pair). Can't wait to read Tyll's review ! Btw, how did you learn all these things ? Are there books which explain this whole circuitry and tube properties ? Or maybe internet guides anywhere ? Wiki doesn't seem to be that explanatory. Edit: I find it entirely fascinating how a vacuum tube intended for radars or military equipment can give your amp an amazing sound.