I've got a very early Eden WT300 that I've had since it was new. Some of the transistors are no longer in production, and David Nordschow specified mostly custom taper pots, which can be hard to come by. There are usually similar substitute parts available which work, but the biggest issue many techs will run into with older Eden is that David hand drew the circuit diagrams. While they're mostly available (sort of) in .PDF, the files are often scanned printouts from microfiche! (No joke). They can be exceptionally hard to read, especially the part numbers,values, heck even the component symbols. The traveler is one of my favorite amps ever, but I don't gig it, as it requires more speaker than I care to carry to get the job done (not super powerful), and has let me down a few times.
Lately I'm infatuated with the Colin Chapman "add lightness" philosophy, and therefore have fully embraced class D. I've also become less dependent on my amp for my tone. My Main gigging amps include Genz, Mesa and Quilter (driving fEARful cabs). All have been rock solid. The designer of the Genz class D and Mesa Subway series is a member here and often participates (and provides support for much of the out-of-production Genz stuff).
Oh and the Trace Elliot gear I had in the 90s was the least reliable stuff I've ever owned. Sounded great when it worked, but I had to carry a soldering iron and a box of spare parts to every gig. The plastic jacks and pots were awful and broke just by looking at them.
