I have a 2004 KX250F. It is my first 4 stroke and I think it rips. I bought it used, but very well maintained. It had belonged to my friend who is a mechanic, so it has a few aftermarket trinkets, FMF pipe, Kibblewhite valves, carbon fiber protection. It has a different tripple clamp, but I don't remember the make.
I was recently on a dirtbiking road trip. I was in Moab, White wash, Rabbit Valley, and Green River. Moab was amazing as always. They have some new trails, a track, and a new dirtbike store. White wash was fun. I only like ride the sand dunes for 30 min or so, I much prefer to ride technical singletrack. Rabbit valley was a blast, we go there often, and I have never had a bad day. West of Green River is a trail called The Devil's Racetrack. It is a double track with burms and a little technical stuff, it was a good last day ride.