I've been thinking about this as of recently, and if I sell my rig, I'll be north of $3k. That's 90% of tube heads under that price bracket, and then I'd have a ton of room for effects, of which I really only use reverb/delay. I could get a Mark, a Road King, Racktifier, shit, or recto AND a 5150
The axefx does have its perks, it's extremely convenient for recording, easy to carry, sounds good, all the effects I'll ever want/need. But it's not the same as a snarling dragon of an amp.
I'm going to the shop Jeff works at Sunday to check out some amps, so that may put the nail in the coffin.