I have not had the chance to try the WA6SE. I have no doubts that there are a lot of tube amplifiers that can drive the LCDs with authority, I just know my Lyr didn't do it for me. It could've been purely tube choice on the tube amplifiers I've tried it with as well, I don't know. I just know in the context of the Lyr specifically, I'd rather spend the money I'd had spent on high end tubes and upgrade straight to a solid state model.
I have a new amplifier coming in tomorrow though, so we'll see how that goes. It's a hybrid amp as well, in a completely different class though.