Let me be very clear. I sold my KLR because of MY inability to deal with it on the highway. If I had the ability to just slow down and be more patient, it would have been fine. I'm one of those that when I'm done riding the fun stuff for the day, I want to get the Hell home. I never had a comfort issue on that bike, except for the wind sometimes. Stock, out of the box, the seat is one of the most comfortable you will find on that kind of bike.
The KLR's off-road ability was great for what it was. No offense, but those that claim a KLR will not handle sand, mud, or technical riding have probably never ridden one and are just talking about what they heard. With the Dunlop D606s and aftermarket suspension, the bike performed admirably. My KLR was held back by my inability as a rider...Not the bikes inability to do things. We climbed sandy hills, rode huge rocks, forged very deep mud and water, and had a blast. One of my best friends has a 2007 KLR with D606s and is way more capable than me. When I followed him and followed his instructions, I was way better.
The Huskys and KTMs are cool, but remember this...A KLR comes with a 5 gallon tank; good for about 250 miles of riding. The KTM and Husky are something like 3.6 gallons and use fuel fast. The last big dirt ride I did on the KLR was in April of this year when a bunch of friends and I rode the forest area around Magdalena, NM. There was one guy on a Husky that had to carry extra fuel cans to stay riding. He also had a hellavua time with his fuel injection doing something werid at our elevation...
If you really want to try a KLR, it is so close to free that you shouldn't avoid it. Go buy a used one. Great low mileage KLRs can be found for between 2 and 3 thousand dollars. Put good tires on it, and order some progressive springs for the front. Then proceed to ride the piss out of it. If you're happy, great. If not, sell it for what you paid for it. All you're out is a set of tires that cost around $100.
When it comes to opinions on KLRs and similar bikes, ONLY listen to those that have actually ridden or owned one. Everyone else is listening to rumor and really has no idea.