There are 2 styles of brush cutters/machetes I have solid success with:
Woodsman's Pal (been around since WWII and was GI issue)
http://www.woodmanspal.com/ It has excellent steel. It can fell a tree, split wood (baton), gut game, dig and is a formidible edged weapon.
The Gerber brush cutter is also a bill hooked short machete. The blade is thinner and overall weight is lighter. Good quality.
http://www.gerbergear.com/