For flashlight-shaped flashlights, the Surge is pretty frickin bright and has nice throw.
Also, pretty much any 4 1.5V cell (4xAA, 4xC, 4xD etc...) light with fresh batteries and a 3 cell Krypton bulb (don't use the Xenons) is impressively bright. This is technically a mod, but since all the parts you need are at most Home Depots all together, it's only barely a mod.
Speaking of mods, you can always get a 2C MAG, three 123 batteries and a PVC (or heater hose) spacer and a KPR112 bulb from Radio Shack for impressive output in a relatively small package. Sputter the reflector or maybe 'arrange' some well crumpled aluminum foil over the reflector for a better beam but slightly less throw.