I'm actually looking at battery options in depth right now.
So far IMO, if maximum power is what you're after, and you don't care as much about run time, the red IMR AW batteries are the BEST.
For run time though, the new 3400mAh batteries from Larry look like by far the best choice.
I need four new 18650's... so going to pull the trigger on a set shortly... still fence sitting though.
What kind of laser or light are you looking to get batteries for?