Another one to look at is the Ultimate Survival Technologies 30 day lantern that runs on 3 D's. 22 hours at a 700 lumen high, 30 days on 30 lumen low, and a 140 lumen medium. You can also get them in a glow in the dark casing. No red led mode like the Seige though and the power button does not illuminate like the Siege. I was undecided between the Siege and the UST 30 day for quite awhile but the extra brightness and glow in the dark casing sold me on the UST. I have their Pico 4AA model as well and it's my favorite little lantern, 123 lumens for 22 hours, 15 lumens for 91 hours. I looked at the AA Siege as well as it has a brighter 200 lumen mode, but it's lowest mode is 50 lumens which in a tent etc. is brighter than I like.
Streamlight also just released the Super Seige at 1100 lumens and 8800mah rechargeable battery, but unfortunately it won't take primary cells which to me is a deal breaker for a lantern.
The Rayovac looks nice as well, and that indestructible series is a good value. I didn't like that I couldn't easily find what the run time was on high, they only listed like 280 hours on low.