In 20 years of doing sound, I have only come across a few amps that were of the OMG, rare, or next level classification. I have NOT yet seen a Trainwreck on my stage, but have seen a few Komet's ( more or less the official TW clone amp company ). Perhaps the rarest and most exciting to have seen was a full wall of 60-70's era Sunn Tube amps actually used by an amazing Doom Metal band! I have had 1 and only 1 real dumble come across my stage and the guitarist that owned it was worth it too!. There has been a sprinkling of rarer Marshalls and other exotic brands, but of the thousands of bands I have worked with, there has only been a small handful that had the OMG amps we all lust over.
To be honest, what I wanted 10 years ago is nothing like what I want today. So while I can say I would be happy with a few of those amps today, I know that my tastes will change. They seem to every 10 years or so.