I don't know any meter that does well being knocked around, but I suppose some are more durable than others. With the Gossen Luna Pro you can choose incident or reflective at a moment's notice, and the dial is large and easy to read, much easier than a Weston II. Really, the Gossen is such a great meter.

I also use a Weston IV and V, and these are easier to read than the Weston II. But the Gossen gets the most use, by far.

The Voigtlander VCII is very small (fits on your hot or cold shoe) and super accurate, and could also be a winner.