I'm looking for a (cheap if possible) computer that resets trip distance with one button. I need it for adventure racing to track distance from point to point. My current computer (Nashbar) requires you to page through to the total trip time display, hold two buttons for 3 secs, then page back to the trip distance display. Obviously, this is not ideal while flying over bumpy dirt roads or single-track, deep in oxygen debt.

All other features are secondary.
Anyone know of one like this?

Thanks in advance