Mace 242
What do you actually want the torch for (yes, I know to see further lol). Do you need it to be hands free, just like your petzl, or can it be hand held (thus restricting the use of your hands). If you are going down the hand held route, then for my own use, I would suggest Fenix torches as others have, as I feel the build quality is far superior to Lenser products (mostly in the electronics, and the quality of the switches/switch covers (which are gas proof for example)). The L2D I use, throws out 180 lumens, and has a nice beam. It only uses two AA's so is small enough to be worn with a head band (thus freeing your hands), as well as having lamp and wand attachments if you had need for them. While all torches in this category look similar, it is the inside that makes all the difference, such as the ability to use lithium batteries (not all torches can!), and staying bright in use, until the very end of the battery life (as your Petzl should).
While I do own the above fenix torch, I will nearly always use a head torch, as it will:
leave my hands free
can be hung from a pocket or pack (and still point in the right direction)
Be instantly ready (as its on my head).
Be easy to hang in my tent, as a tent light, or stand on its back as a lamp.
Be easy to maintain battery life in cold weather, as the battery will be either on the back of my head, or in a pocket (as batteries lose power in extreme cold)
Be generally made of plastic, so easier to touch in very cold weather.
Have a brightly coloured head band (I know many won't want this.......In case the wild life have torches too lol) so will be easy to find if dropped.
Etc etc.
Happy torch hunting