I have got a Petzl Tikka XP and a Zipka Plus, the former is nice and bright and the sliding difuser gives an even light. However it is slightly too big for my tastes to EDC due to the strap. The Zipka is not as powerful, but bright enough for everything I have needed to date and works pretty well to EDC in a coat pocket. As I understand it, while the outputs are not regulated, you can get a far more consistent output by using NiMHs.

My Tikka XP is actually an 'ATEX' version making it suitable for use in (most) potentially explosive environments, similar to the 'HazLoc' spec. Some may value this feature and I understand the e+Lite has this approval too with the advantage of lithium battery life. I was thinking of getting a couple of e+Lites for our cars but I am now keen to see the figures from Petzl for 0 degrees runtime first!

My ideal headtorch would be a Zipka version of the XP ATEX with a CREE or similar LED.