If I needed a good machete type knife, I'd look no further than my RAT-RTAK.
Here in Iraq, it is just as good for lopping heads as for trimming the verge. <img src="/images/graemlins/blush.gif" alt="" /> <img src="/images/graemlins/crazy.gif" alt="" />
Okay, that was bad, but this is an impressive blade nonetheless. Once again, here's the link:
http://www.jungletraining.com/rat%20knives.htm