Vancouv, unless you intend mucking about with GPS approaches then throw away all the marketing blurb and get yourself down the highstreet. I use a Garmin eTrek which cost me about £100 and it has a barometric altimeter with it. Its a 12 sat GPS so accuracy isnt a problem. This gives you all the basic info you need including a crude moving map showing waypoints. If I want to get really flashy then I plug it into my laptop and run Navbox Pro which cost me £70, this has full colour, blah, blah, blah and still works out cheaper and a much better display than quite a few I have seen on the market.