It all depends on how you dial it and who's playing through it. I can dial in some really plastic, fake, digital sounding tones on the HD147 and make it sound really awful if I want to, also. In fact, a good portion of the presets I would describe that way, but probably at least 50% of them are decent. Screw presets, though, it's all about dialing in your own sounds on these amps!
Right now I'm using the Criminal model and it is very convincing. It sounds close enough to real tubes that I could be fooled in a blindfold test, at least in the room. I will record clips as soon as I can, I think I would have to mic the cab to do it justice, as the direct out just sounds like a POD (not bad, but not quite realistic.)