My first choice would be either the Cold Steel Kopis or Bowie machete, both now, unfortunately discontinued, followed by just about any other good quality machete with a spear point or barong style blade. There are plenty of good ones available for well under $50 (I know, you didn't mention a price range, but it's definitely a factor to consider, as long as lower price doesn't equal lower quality). I personally wouldn't consider anything outside a minimum 10" and a maximum 18" blade, with preference going to the shorter version just because it would be easier to carry. If you want a spear, Cold Steel makes several good ones, just pick what suits you.