A contractor friend that brings me a lot of work has one that I've used and like a lot. Invariably we'll be finishing up something outside either in too bright Sun or around dark, and it really helps being able to see the line. If I outlive the saw that I have, this would be my next choice.
Sometimes on certain occasions, I've used the elastic strap on one of my head-lights to strap the light onto the back of my hand, so I still have the use of that hand for other task. You might try doing that. It just takes a little stretching and twisting to get battery and light in the right place.