I'm still kickin' a 2002 DL1000.. Good bike though I must admit. One downfall of the 1000 I see is you have to tinker w/ them a LOT to get em' running right. On the flip side from what I hear the 650 comes running good right outta the box. I can say though, that once you put the effort into getting the Vee tweaked out it runs like a spider monkey jacked up on Mt. Dew.
Honestly speaking, I would be more than happy to add a 650 to the arsenal but cannot see it happening in the near future. I'm still having to much fun toying w/ what I have.