Recommend me a GPS reciever!

As some folks know, I’m going to Afghanistan in September. I was pondering the merits of buying body armor, but asked a friend who’s going to Iraq who had been in Afghanistan before what he would recommend.

He told me to skip the body armor and instead build a survival pack, about the size of a fanny pack ("bum bag"for UK, Aussie, and Antipodeans) with waterproof matches, a compass, powerbars, a basic first aid kit and a GPS unit.

I have little to no idea what to look for in one of these, but I’ve been looking on U.S. Cavalry and the like and it seems there’s a large range to choose from. I just need a basic unit that will get a reliable signal, and should be waterproofed and ruggedized. Is the basic USD 199 unit from the sporting goods section of Amazon likely to stand up? Your thoughts are appreciated.

Crap, double post. Mods, please delete one of these.

Reported for you.