In addition to what Phaserburn recommended, consider using a Reflectalite GH24 bulb with the 6AA NiMH cells. I don't know if you'd need to get a metal reflector, though.
Reflectalite GH24
For an even brighter option, consider purchasing an unregulated 8AA-to-2D adapter (there's a groupbuy going on right now). That will generate 9.6 volts, which will overdrive a KPR-20 bulb quite nicely. (I've found the KPR-20 bulb at Ace Hardware and Sears Hardware. It's the generic equivalent of a Mag 7-cell bulb).
Specs for KPR-20 bulb
An alternative to the KPR-20 is the Pelican Big D Rechargeable bulb. Phaserburn posted a thread about it here:
Pelican Big D Rechargeable (SLA) bulbs
Lightbringer: 9AAs in a Mag 3-D would flash any standard Mag bulb. The Mag 3-D is an excellent platform to build a MagBP-85, though. Read about it here:
BiPin Mag: The First Mag-MagCharger Hybrid
fivemega is going to release his 9AA-to-3D adapters and another run of aluminum reflectors soon. Keep your eyes peeled in the Groupbuy forum!
To get back to the original topic of this thread, I think the EverLED is a decent choice if you value runtime and shock resistance. Its brightness will not blow you away. I don't have a lux meter, but I'd estimate the brightness is comparable to a 3-D Maglite. It can be used with any 2 to 6 cell PR base flashlight. The brightness doesn't improve with using more than 3 cells, though runtime is better.
I use an EverLED in a Dorcy 4AA tool light for an emergency glove compartment light. I don't need it to be super bright, but I don't want to worry about the bulb breaking if I drop it, and I want it to have a long runtime. The EverLED fits the bill nicely. Of course, I bought the EverLED two years ago when there weren't many Luxeon lights available. If I needed an LED emergency flashlight today, I'd probably get a UK eLed 4AA ($20) instead of an EverLED.
If you want a modestly bright, reliable light with good runtime, get the EverLED. If you want crazy bright, go with an incandescent mod.