I think a TE610 would complement the KLX well. The KLX works great for the tight trails and singletrack and the bigger bike would be perfect for the longer trips but still has plenty of good offroadability. The TE510, 450's 250's are race ready enduro bikes. Still nice, but I doubt I'd get one since I'd be using them for the same stuff as my KLX and I can't justify two bikes for the same purpose. Any one of them would be a good replacement for the KLX when the time comes, though. Don't think I haven't thought about it.

The '07 KTMs look nice also. As well does the 07 WR. And don't forget the 08 KLX450. So many bikes, so little time (and money). If money was no object, I'd have one of each.

 

This is my favorite dual sport.

 

Man, that is beautiful. Not bad either at an MSRP of $8500 for a fuel injected twin. Only a 5 speed gearbox, though, but that is pretty typical of these street legal enduros. The dealer that I bought my KLX from carries them. Guess I gotta add another one to my wish list.