The HD option really is something else, and can be bought from the states for surprisingly little cash, it's not enormously more than buying a standard Wide lo-def from a UK vendor. But you do need to budget for a chest mount to get the best of it, and a spare battery would be wise too, the life is a bit short.
The only real plus side of the older Wide is that the footage can be edited with any old rubbish, Windows Movie Maker handles it fine and it doesn't need a lot of processing power. The HD records in different formats and needs a bit more oomph, or a lot of patience.
The Gopro does look silly on your head but it's reasonably light and not huge. But the chest mount is such a winner, it really is all Gopro need to make them the best choice for now, and that's all down to the funny shape. There's not a better all round mount.