Swiss amps

...for the other side of the service senerio i thought i might have had a major problem with my 29m after applying a well known contact inhancer with the result being that my tweeter flammed out..i called goldmund usa and sent the amp to them and they very quickly went over the amp and even re-soldered everything with silver solder and sent it back with a new box..all within 10 days..could not have asked for more from a company....just the other side...

even swiss miss is overrated

I've got a Girard Perregaux that is beautiful and works flawlessly. That is, until you drop it on a carpeted floor, and the mechanism gets knocked out of place and needs a $450 adjustment. I've worn the watch maybe 6 months total and have had in the shop twice. Which of course, in the US, there is only one, and the wait for repair is usually a month. Luxury items... nice problems to have...

i've demo-ed several of the amps you've listed (Dartzeel, FM Acoustics, & Goldmund). each employ unique circuitry (not the typical class A, class A/B, &/or class D) which makes them rather unique fm other stuff out there.

The more complicated the watch the more likely to break on impact. If you want a watch that should be able to withstand anything look at Wyler. It has extensive protection from impact built in. Not cheap though and only a chronograph movement or Turbillon.

As or amps it is kind of the same but in a different way. The better the sound, often the less protection built in. Hence more likely to have problems. I still am itching for a cheap amplifier as a backup for my tubes. Often the more unique an item is the more of a burden it is to maintain. The same is true for cars.