I ordered a Garmin GPSMAP67 last week, but due my location (Jersey) they decided now they can't ship to me. So, before I go and find anew place to order from ...what else is out there worth looking at in a waterproof shock proof handheld of similar size that i can use for walk-in / trekking..GeoCaching... Idealy with Mac software. SO far I have only ever used Garmin, apart from a quick foray in to a motorcycle TomTom..then I went back to a Zumo. Colour screen ideally as big or bigger than the 67 screen. Does not need camera, iridium connection or two way radio. Thanks