I am up, down, sideways, and back again with trying to figure out what bike I should buy... XR400, YZ426F, WR426F, KTM520MXC, XR650R, something otherwise... I am just about nuts trying to figure out what's going to give me the versatility I want without the "mess, expense and smell"... I am 6'5", 260 lb.; 25,000+ miles of mixed street/trail riding under my belt with '83 Yam XT550 (sold years ago) and '99 Kaw KLR650 (ride it everywhere; on-off; but it's too BIG for the harder dirt riding that I also want to do now). I own 80 acres of woods with trails right out my back door and there's an active SX-style club track just four miles away... I need a stone-reliable dirt bike that requires little maintenance (because I do NOT dig mechanical stuff -- I'll do basics, but that's it... it just doesn't trip my trigger)... The bike has got to be able to deliver excellent trail performance (XR400), but also I want to learn how to ride that SX track (YX426F)... so, it'd be cool if I had a bike that could manage the trail and the track reasonably well (OK, I'd learn what to do to be able to switch a few parts around to transfer from one scenario to another)... but, I am not very interested in racing; just want to get into the dirt glide and the challenge of it without losing my shirt (like the 520MXC price does to you)... I have a Honda/Yam dealer within 5 miles and a Kaw/Yam dealer within ten miles... So, I can get a deal and I can get parts readily, if necessary... OK, what would you recommend? You probably know more about this than I do, but I share your passion for riding, having fun, and a solid challenge. Care to help me out with your opinion?