Are you people daft? Go to the michelin website. These are mostly bias-ply tires, and neither the bias nor the radial come in sizes that fit the C14.
+1 I'm all for using longer lasting tires if you are touring, only if the tire will work properly for the application. If not, it's just not worth it.
If you are superslabbing it, and want higher mileage, be sure to run the proper air pressure, what Kawasaki recommends gave me 8200 miles on the original front tire, and around 10,000 miles on the rear. My angels have around 9,000 miles on them so far and they are doing well. I do have fun in the twisties here in Pennsylvania and also West Virginia. I do a lot of long trips on the interstate as well. Use your brakes instead of engine braking and you will add many miles to the life of your tires.
If Michelin made a touring tire that was a radial in the size the C14 required, then I wouldn't see why you couldn't run it. I would just not do any sport riding on it. The tire wouldn't be made for the forces generated, but for the interstate and commuting, I'm sure the hypothetical tire would be fine.
For me I'll stick with sport touring tires, they aren't too expensive and if cared for properly they give high mileage and are great in the twisties. I seriously doubt a tire like the Commander 2 will give you appreciably higher mileage than a properly maintained PR3.