In reply to Professor_Professorson:
The review posted above is definitely worth reading (and not just because I wrote it); however, there's one caveat to this which hasn't been shouted about much yet, because it's not actually out, but the information is out there, so I don't think I'm releasing any embargoed information when I mention that the NAO+ is soon to be superseded by the NAO RL.
I'm a massive fan of both the NAO+ and the SWIFT RL, but were I to own a single one, I'd choose the NAO+. I love how it's weighted, love how it fits, love how bombproof it feels, and love that extra battery life. This isn't to say I dislike the SWIFT, because it's similarly amazing, but I think I've historically favoured battery light over brightness (and the difference between the two in terms of their brightness is - in spite of what the figures suggest - relatively subtle).
The NAO RL is a really interesting development, because it's a little less like the NAO we once knew (which, compared to this, looks incredibly old and clunky) and bears a much greater resemblance to the IKO (albeit significantly more supercharged). Interestingly I was a bit indifferent about the IKO, but I think it's interesting what Petzl have done, drawing upon its design and technology, then applying it within a larger and more powerful headtorch.
I'll spare any further details for now, but will post back a few thoughts if anyone has any further questions. I've had a sample on loan for the last couple of months, so have a fair grasp of how it handles/performs in use.
Post edited at 11:31