Adventurespec sponsored a guy (Landon Poskitt) to ride goldentyres around the world on a couple trips (Mongolian Rally, Baja America, I think a dakkar, and across siberian and Kazakhstan) and he of course says he likes them. If he can ride them the places that he did, then I'm sure they are good enough to take any of us anywhere we'd like to go.
His trips are worth watching on youtube actually. Pretty cool stuff, impressive adventures. It's called "Races to Places"
2002 DL1000: 75k miles. Bought at 50k miles.
1992 XJ600: Red, Very custom.
2002 Vespa ET4 150: The wife's ride.