In reply to RJP:
If the Ninox II has the same dual light spread pattern and battery indicator as the Trail Runner II, then I would say it is an excellent head torch. They look as though they use the same bulb arrangement, just that the TR2 has the battery pack at the rear. As you don't mention running, the lighter Ninox may be the one and balance not a problem. Apparently the battery compartment cover on the Ninox is 'fiddly' (It's fine on the TR2). On/off button is good, has a silicone strip for grip, strap can be removed.
There is a rechargeable version of the TR2 but I don't think spare rechargeable batteries are as easily and reasonably available for the Silva headlamps as they are for the Petzl ones - emails to Silva about this garnered zero response.
I normally use Petzl but I like the Silva lighting technology, in the above models, more.