I fish for sea trout in the late evenings / night and often have to cross streams in maybe 3/4 feet of water. The water is clear but sometimes fast moving. I'm currently using a P60 with LED and smooth reflector which allows me to see the river bottom but would like to get a good headlamp in place of the hand held light. I've narrowed it down to either the Zebralight H31 or Surefire Minimus. The light would need to have a fairly narrow beam to penetrate well in water and as there are often cattle in the fields sometimes with bulls amongst them, I'd also like something with good throw to avoid walking into trouble. There's a big price difference between the two. Would these be good choices, is the Surefire worth the extra cost over the Zebralight, and is there anything else I should consider. Thanks