Isn't the main difference that the L7 has the built-in NiMH rechargable, while the L6 is a good outdoors light, at least according to some of the reviews I've seen on here? Better throw than the L5, though a bit more expensive and thus the extra value being in doubt?
If I am following,L7 is a rechargeable L5 then I am more than happy to stick with the L6 running 150s Pila's I have the L5 and I like it just fine but it is not the L6 by any means IMHO. I run my L6 mostly on the M4 body with 2 168s Pilas works great the L5 runs on 1 168s Pilas the L6 body runs on 2 150s with the M4 head and a N2 lamp.
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