I don't think you'd go wrong buying any on your short list. I've purchased tubes from Kevin at Upscale - very informative guy and I trust his recommendations completely. With the Anthem, you get a new unit with warranty, a definite plus over the used amps. The Anthem has a tube gain stage, so you can mess with the sound a little by rolling different tubes through it (and you get access to Kevin's "secret stash" of tubes by purchasing an amp from him). The Anthem has as much power as you'd ever need. The Anthem has received nothing but positive reviews. The other amps are definitely good, and I'm sure they all sound different. The advantage of buying one of the used amps on your list is that if you don't like it, you can probably sell it for what you paid. If you didn't like the Anthem, you'd probably lose a little on resale.