After using my cheap Silva during the Great Lakes I'm thinking about investing in a thumb compass for races and trial style events. My Silva is fine, but I suspect a thumb compass would be much quicker to use.

I want to get one you can set a bearing on, because in most races I won't be running with the map out all the time. I often plan my bearings before hand and write them on my arm.

The Moscow 11L\R looks alright to me, but does anyone know any better models for the same price? Or should I splash out on a Silva one?

Is it worth buying one at all??