I'll pile on with the loving the JJ 2a3 in the Stereomour. I tried to order them several months (I think Sept) when the issues where being explored but they wouldn't let me. I ordered them two weeks ago on Wed and they arrived that Friday. So the delivery was amazingly quick too. I have put at least 150 hours (couple of 24 hr days) on them rolling and breaking in 3 12AT7. They have excellent bass, drums are fantastic, top to bottom great. I have not a/b'd to the RCA 2a3 (dual blackplate)that I have but I know the bass and percussion hit me right off as holly smokes with the JJ.
Eric