In reply to danm:
Whenever I've had a BD torch, and any friends who've had one, they've broken very quickly. Perhaps a coincidence, perhaps build quality has improved recently. A shame as I really rate all other BD kit I've had.
I've got the Actik with core battery, and so far I'm very impressed. Excellent beam, lightweight, comfortable - so much so I've now started using it for running instead of my Silva X-Trail. The only downside I can see is the lack of constant lighting, but with the core battery there is a very gradual initial drop off.