Ok I'm running new Mullard EL34s now and they sound better in comparison to the Gold Lion KT88s on these speakers. I've been listening at lower volumes lately (with a new baby) and the 34s help bring out the midrange more than the 88s. Acoustic guitars sound particularly amazing. Rock and distorted guitars sound great too. Not as much bass as the 88s, but that's fine with me on this setup. Someday, when my son's older, I'll bring the Veritys back out, turn them up to 11, and do some A-B tube comparisons with him. I do have a question about the bias setting though. The EL34s don't seem to tune the same as the KT88s. If I crank up the bias all the way, the dial doesn't reach the middle notch on the LM display. Is that normal? Anyone know what the bias setting should be for the EL34s?