Lol, let me explain the truth here, sorry did not see your question here. I give my BA to my nephew as a gift, so i cant sell it. And i am wondering what tubes are you using on 2A3MKIV and BA. So with WE417a and EML2a3 mesh, i really cant imagin it is worse than BA in bass response and also has less body for vocals? My BA has the PX4 and mullard ecc35. Maybe your BA is different. Also mine has the old transformer like yours. I think people might have different tastes. And at this price range all the difference might be subtle or depends on personal preference. Just like lots of people like Stratus on HD800, but i think it is just meh. Reason selling my 2A3mkiv is too complicated to say here, has nothing to do with its performance, lol