Thanks folks I was mainly looking at people experiences with tires as I have not experienced any of the modern options out there.
I hear you, akalogan. There are quite a few tires out there, especially if you haven't paid any attention to the World Of Tires recently.
Me? I don't mind tire threads because I'm dedicated to the Korean-made "Stinko" 244's and am sticking with them. For the record, I use them about 70% on gravel roads and 30% on pavement to include interstate speeds. A rear tire lasts me around 5,000 miles and a front around 10K with no true degradation in performance aside from the taller lugs wearing off the rear wheel like they're supposed to and some scalloping on the front tire, but that doesn't concern me. By the time the scalloping becomes advanced, it's usually time to change the tire, anyway.
Unfortunately, I've never seen a one-source compendium of popular KLR tires that discussed their virtues and drawbacks.
Even the ratios like 50/50 or 70/30 dont mean that much, but they at least give you a starting point for general tread design.
If you're looking for a 50/50 tire, I would do a search for tires in that field and throw a couple of possible choices out here and see if anybody has any experience with them.
It's all relative. A lot of guys on here ride more "street"-oriented tires in places where I probably wouldn't venture with my "50/50" tires simply because they're better riders than I am.
If I were in your shoes, I would also lean toward a more 50/50 tire because to me a knobbed tire on the pavement is definitely less of a concern than having a slick tire in the dirt or mud. The only drawback I've ever seen from a tire of this type on the pavement is that they're louder and usually have a speed rating in the 90mph range, but the KLR won't go that fast, anyway.
Once you get your first set on and do some riding, you'll figure out what you like and don't like about that particular tire or design and can make those changes with your next set. It all depends on how much money you want to spend.
I will throw out the recommendation to try a pair of Shinko 244's as a baseline tire if you're largely going to split your riding between pavement and moderate off-roading like gravel and dirt roads and dirt single tracks. You can get a set for less than $100 so if you don't like them, you're not out much. Unless you ride way beyond your capabilities, they won't get you into any trouble either on-road or off.