I have the 219ia. It is very refined sounding with powerful bass and it produces a holographic soundstage. The tubes are very expensive, though. Oh, and it's horrifyingly heavy. Although it can drive some rather daunting speakers from a SET perspective, it can run out of steam so, needless to say, speaker matching is important. I presently have it running into some Omega full range speakers (Super 3i with subs) but they aren't exactly my cup of tea. I will replace them sometime in the future. Prior to that I had Sonus faber Liuto Monitors.