You will be pleased
The suspension on the 08 w's is awesome. It sorta takes away the trail hammering while you feel like you can really go fast. You can lug that bike down to a single piston stroke and it will just pick up smoothly when you crack the throttle, just like the KDX, and of course hills are no problem. I have owned KTM 300's, 200's, and 250's..all are good but the 08's are a giant leap forward. Interestingly enough, I bought an 06 KDX TODAY to use as a trail/trail cutting bike . I'm 61 and have quit racing this year but my son races the SERA Hare Scramble Series in the south. We belong to the Perry Mt. Motorcycle Club in Alabama and work on trails for events we put on. Most members ride XR's and CRF's for work/trail bikes but I couldn't resist this KDX. Raced one, an '88, for a few years and have to say it is my favorite bike of all time. I have it in my barn, minus the jug, (long story about loaning a bike) and plan to restore it soon.
However, the new bikes, all of them, are better today. You made a great choice..have a blast. Oh, and silicone spray will help keep all that black plastic looking new. It scratches really easy.
Pops