Some comments:
Of the standard style machete for very light vegatation and grass the Martindale are excellent. I need to pick up some larger ones. Although distal taper is nice on these knives, as it allows a finer edge near the tip, and thus higher performance, it is no subsititute for a primary grind. In fact, because distal taper moves the balance point back towrds the grip, it is exactly the opposite of what you want for chopping, though for its intended purpose (light vegatation) it is not a limitation.
I need to pick up some longer models, as I am very interested in their performance on grasses and such, and for general trail and briar patch cleanup.
I can highly recommend Daren Cutsforth of
www.cutsforthknives.com the service he gives is great.
Re: HI Khuks
They are very tough. You are talking over half an inch of spring steel, virtually indestructible toughness. Bill Martino is also an excellent person to deal with, and has the BEST warranty policy you could ask for.
That being said, I have worked with a number of HI Khuks of different styles, most recently the BSA, King Kobra, and a 25" siruapti (though this was a couple years ago). The balance was not right for my style of use, and the cutting performance was not very high at all.
As much as I like Bill Martino, I would not buy another HI Khuk, they are just not suited for my uses of a blade. I will soon buy a Cold Steel Khuk and have it rehandled in micarta, that should be interesting.
The Valaint Goloks are on another level of performance in comparison to standard machete class blades when the wood starts to get thicker.
The convex profile is ideal for wood work, and they can accomplish a wide range of tasks.
Here is an article I wrote comparing the Ontario, Tramontina and Valiant knives, you may find it helpful.
http://outdoors.free.fr/s_article.php?id_article=64
I would stay clear of Tramontina machetes (but actually like their kitchen knives for industrial use funny enough.) All the Tram agricutural blades I have used have been terrible. They are cheap though.