Greenjacket, Rinaldi's Armageddon is $395, so upwards of that I would assume. Marion thanks for the links, I have been looking for that for some time to put a picture to Greenjackets words. That is a very solid looking blade, the only thing I would change would be the addition of a primary grind. The second knife from the top in the next picture has just such a grind and is an excellent light brush knife :
As Greenjacket noted you always ride between functionality on balance, you can't optomize something for really light vegetation and thick wood at the same time. My only real problem with that design in general is that the concave curvature reduces performance in thick wood chopping, and thus a more straight blade is often preferred, but this doesn't do as well on light brush as you have a loss of hooking action. You need to figure out where you want the performance to be maximized.
If I have a decent axe for felling, I would take the blade with the curved design for maximum ability on light brush clearing and limbing. However if I don't have the axe, I prefer something with a straight edge, and a dropped handle. Just extend the Battle Mistress "E" out to 14", widen the blade to a full 2", and thicken the handle and completely enclose the grip. As for the Blackjack handle, many synthetics are very durable, no idea on that one, however the end hook on the grip looks a little too sharp for me, though a lot of people prefer them that way.