I've got a Pelican Versabrite II which I like. It has a swiveling head, takes two AAs, and the beam is not too narrow like some of their others. Also, I have an EverReady Double Barrel I got at a closeout place. It's a four AAA model and has a Xenon bulb for lots of light. Seems to be a good one.
IMO, the cheapest, ruggedest, and still pretty bright AA light will be a LumiLite Z Lite (rubber covered) or its even cheaper companion, the LumiLite Krypton model. Prices are about five and three bucks respectively.
You might want to rethink the DL 123 lithium batteries. Go to Arizona Gun Runners and check out the prices on their SureFire E2 (about 70 min run time) and a six-pack of 123 lithiums. Just under $49 and $16 respectively. Also, I'm not sure how much they charge for the E1, but it gets ninety minutes out of one lithium battery and puts out 15 lumens. I found with my Streamlight Scorpion that after the first month of playing with it, I settled down into using about a pair of batteries per month, and I'm a security guard who works at night. That's about three bucks per month for lithium 123s if you buy off the web in bulk as I mentioned above. And batteries may last longer for you if you don't use them as much as I do. (I now use a SureFire 8X rechargeable and standard MagLites.)
I'm gonna order soon for a buddy and myself--I'm going for a SureFire M3 Millenium this time! Dam I'm obsessed with knives and lights!
Karl