They had a Husquvarna TE250 at the last enduro I was at. It was the first one I have even seen. It looked like it would be fun. Not sure how it was or how parts for it are going to be, but it looked nice anyway. :)
I saw a red 450FSE at the local gas gas during the summer. It was nice, but I heard they had some problems with the starter, but updated it in the 04 model. You might look into updating the parts if possible Enduro_nut. They wanted a mighty shinny peny for it.
I have just ridden the te 250 husky a buddy has got one it has good top end power exelent front forks the best enduro fork's around.
on the down side you have to keep it reving as it is a bit flat at low rev's the Yamaha is better at low rpm,it's just got an electic start no kick start for back up and if you leave it standing for a couple of week's some times you have to get a boost start.
My dealer told me that the Marzocci forks that come on the Husqys build up pressure really bad during races or fast intense rides. So you have to loosen a screw on top of the forks to let it out and then tighten them back down and that will help with the build up.