I love those Jason Knight khuks. I'm a big fan of the curved blade. HI's are great, and they have different ones depending on what you want out of them. My favorites are the Ultimate Fighters and the Chitlangi and Sirupati, out of their lineup. I thought I liked the Amar Singh Thapa, but turned out I was wrong. Mine is nearly 1/2" thick! They're also VERY cheap for the quality of what you get. You can get them from anywhere from 50-60 - 250 depending on what you're looking for and if you get one of the DOTD's. They're tough, and much better performers in my hands than their more machete-like competition. Anyone who is making a comparison to a multi-thousand dollar katana needs to rethink their comments, because they don't know what they're talking about. HI's are very inexpensive and top quality, although fit and finish may sometimes leave a bit to be desired (because they're handmade on fairly low tech equipment by Nepalese craftsman to US standards). Not at all the same thing.
I've made a few KLO's myself, actually.
Just finished this one; probably will be letting it go.
Also did this one in Alabama Damascus:
BePrepared has another one I made as well. I'll be making more. I love khuks.
Buy what you want though. If anything is definitional, it would be the curved shape, if not the country of origin. Here on Blade Forums, there tend to be folks who think that if it's not a thick chopper, it's not a khukuri, but there's a lot of variation. I will say that my thinnest HI khukuri is 3/8" thick at the spine, and that's a light and quick sirupati. Thinner, long blades, tend to get classified as machetes. There IS a difference. The thinner blades are better for slashing and cutting light stuff, but are less good at heavy chopping. I own several of the Kabar kukri machetes, and a few Cold Steel ones, and while they're reasonably good at chopping, they bind much more easily, suck at splitting, and in general just don't work as well, at least in my hands, as my HI variants. But, they perform much better at lighter tasks, and that being said, I do like/prefer thinner blades. The Reinhardt Becker Kukri is only 1/8" thick, and that one seems to do better at chopping than its thicker Kabar friend. The geometry is pretty important. I second the comment that the CS versions are awful because of the handle material. Way too rough, and really cuts up your hand. I think they were primarily designed for chopping up hanging pigs and "fighting."
Before you buy though, give some thought as to what exactly you are looking for.
Please don't say fighting. There's no such thing as a knife fight. If you ever are in a "fight" with someone using a knife, they're trying to murder you, not fight you. Anyone looking to harm another human being with a knife is going for assassination, not a duel. And you are DEFINITELY going to get injured, and you're DEFINITELY going to go to jail and probably get violated by large tattooed men. Just saying...