I recently (11/04) did 1,300 miles in one weekend on my '99 SS900 (hey BCM, it's coming your way on the 22nd, and I WILL send you an e-mail soon, I promise!).
No ill affects, great long distance ergos with a tank bag, happy as a clam in the twisty stuff. The 1000DS can only be better still, I would think.
However... there's a guy on this list that I've met out on the back roads with a 749 who makes the SS900 look like your father's oldsmobile. That's his thing: Fast, furious, & fun, but mostly local riding.
I kinda prefer to consider my 900SS as a long distance, unique touring machine that's also great for saturdays & sundays in the twisties.
But... 749 it's not.
So it largely depends on HOW you want to ride, in my opinion.
Just my