I don't know anything about Kukris that are actually made in Nepal. the impression that I got was that a lot of them are touristy junk. Like Samurai swords that you find in the mall. That isn't to say that any of the ones that you linked aren't good though.
I have a Cold Steel Kukri Machete. Made in South Africa. I can't find the video any more, but I got it after watching a torture test of the thing. Took a guy like 15 minutes of abuse to get the kukri to a point where it wasn't safe to keep using. I'm talking chopping through steel beams, clamping the blade down and jumping on the handle like a diving board, thing is a tank. I've seen it get below $20 on Amazon.
That's the only one that I own, but if I were to buy another, it would be the Ontario Knife Company Kukri. Made in America. The steel should take an edge better and the handle should be more comfortable. Not sure that it will stand up to the abuse that the cold steel machete can, but you shouldn't ever have to submit it to that abuse unless you're trying to break out of jail with it or something.