I completely disagree with Navaho on the WR stuff. We ride together and talked quite a bit about his issue. I believe his forks were too soft. My 09 displays none of the stuff he comlained about. I went from steel 06 to Aluminum 09. My 09 is much more athletic, better side to side, feels lighter while riding, stabil as hell.
I'm glad that you like the '09. There were a few things about it that I thought were an improvement too but certainly not the suspension nor the stability. I'm not alone in my opinion about that as I have read many similar complaints.
The bottom line is I was more confident and faster on my '06 than the '09 at the time, no question about it. I didn't see any good reason to waste a lot of money on a suspension that was no better by design than what I had already. The open-chamber WR forks are outdated and weak by comparison to what's available now. When I make the switch to a better bike, it will be mainly for the better suspension. I have no gripes about the WR motor or the ergos.