would say go for the petzl. its a lot more practical than the ebay one. the ebay one has a discharge time of 180 minutes so you wouldnt want to either forget to charge it or go walking at night for too long where as I have changed my battery in the petzl tikka once. also. its too bright to climb with if you accidentally end up climbing in the dark.
PUSH YOUR LIMITS, MIND YOUR ANKLE