Just an FYI regarding the contour line, if you're looking at your options:
The Contour GPS and some other models (didn't keep myself up to date on that) can be connected to an iPHone or Android device via Bluetooth, in which case you can edit your setting on the fly and also have a preview before recording. Only downside is that you can't have the preview AND record at the same time (that said, that was last time I used it. A software/firmware update was released since then and maybe allows for that, not sure yet)
http://contour.com/software/mobile/