Eneloops for the win. And if you have camera's, they make a new version with enhanced capacity, although, they are pretty expensive.

I've had some very bad luck with Energizer Rechargeables. If you don't use them for a long time, they will go completely dead and you can't get a regular charger to make them take a charge. I ended up throwing out about eight of them a few weeks ago.

Energizer is now making "eneloop" type of batteries (the kind that comes pre-charged in the pack, and hold their charge over a much longer period of time). I'm trying some of those out right now, but I suspect I'll find myself just sticking with Eneloops. They are pretty rock solid. Only complaint is that they don't make "real" D size versions of them, they are just AA batteries put into holders. They fit, but nowhere near the capacity of a real D cell battery.