[euromodder]

I can tell you what not to get :
GP 2700 (2600 mAh) NiMH rechargeable batteries.

Freshly recharged, they're OK for fast discharging things - like a camera flash - but they discharge rather quickly when they're not being used.

Using them in slow-draining equipment seems to kill their ability to be recharged fast (4 in under 20') which unfortunately was the main reason for me to buy them.
Half of my 8 sets of 4 can't be recharged fast any longer, though they still work in the slow charger (8 hours / set).

I've heard good things about the Eneloops, so I'll be trying out a set of those.