RE: The "knock offs"
The "bighorn clones" seem to be divided into 2 camps: the p350 versions from in various brands mfg'ed by (I believe) Wanda, and the SunF type which has slightly different tread. They are close to the original Bighorn, while SunF also makes a version more like the 2.0 that seems harder to find. I have no experience with the SunF stuff.
This is my experience this far:
Got some ChapMoto Ocelot P350 in 26x10x12 a few days ago. This is the bighorn clone sold under many names (ie-journey p350, etc). They cost $304 shipped to my door. After finishing up well after dark, I'll give you the rundown... Pre tires specs, w/OEM at 5psi. Tires have about 1/4-1/3 tread...
hondasxs.com
The basic bias P350 proved to be nothing special from a wear or puncture standpoint. In fact, I'd say they aren't as tough as the OEM 700 tire. I've never run the HD versions of the bias, but I am currently running the radial versions, and I'm happy to say they have had no issues (thus far) with flats, and seem to be wearing better. Time will tell, but as of right now, I wouldn't bother with anything but the radial. It has a noticeably stiffer sidewall and higher load rating.
Now, the real question is wear? The bias are half the price of real Bighorns, but don't seem to do half the mileage...or even close, realistically making the savings non-existent. The radials are doing better, but I suspect they won't make the cost/mileage payoff either, so if you want Bighorns, you probably ultimately better off to cough up the coin for the genuine things. That's my plan next time around.