If you're still going for oldschool, energizer batteries and duracell batteries are the best, but rayovac batteries have been proven to go longest, following rayovac is energizer, and after that it's duracell, compare the durability with the price, and buy that one.
But I think most people just use any batteries they can get their hands on.
Who hasn't been in the position searching deperately for batteries in every wireless electronic device in the house crying because some zombie is decapitating you in RE4 with a chainsaw after you've finally found that red catseye for the treasure that's now worth 20k...

I hate it when that happens...