I got the Nite-Ize LED upgrade for the Maglite and I find it is very weak.

The AA Maglite is too heavy for hiking or EDC... I highly suggest you look into the Fenix L0P or L1P if you want a decent flashlight.

I agree some of those more powerful LED mods for the Maglite might be fun, but unless you already have a AA Maglite lying around, I would not bother with Maglites at all.