Jim's the guy. He was selling his 520 on here not long ago. His user name doesn't come up anymore, so I'm not sure what happened. Yea, he and his brother have put major miles on them.
All this speculation; do we know of anyone who's 525 has shit the bed after 2000 mi or 5K or 7.5K?
I'd have zero reservations taking the 525 to the end of the world and back. Let's face it if it can handle Dakar your RTW trip is no biggie.