I've owned every version of the Uber, and IMHO the original release is the one that has the magic. My very first Uber was an original version (somewhere around serial sign #44). It was absolutely huge sounding, so thick and so complex. I got talked into trading it for a rare one-off Suhr modded Marshall, and stupidly figured I could always just buy another Uber. Well, the one-off sucked and I went about trying to replace that Uber with another one. Trouble was, every other version of it didn't have the huge sound stage of that first one. I went through them all, some more than once - green, blue, twin jet... all great amps, but they just didn't measure up to my memory of that first one. I finally found (here on RT) where SteveK was selling his favorite Uber - an original version and lo and behold, it sounded exactly like the first one I had, maybe even better. All IMHO of course and to each his own, but I know what I hear and I wouldn't trade this Uber for anything.