There's absolutely no reason why I can justify making a reply here, but seeing (no pun intended) as you're talking AAs as an option here...can they be rechargable? If so, what about NiMh?
When I got my digital camera I chose the one with AAs so that I could always put fresh ones in and not rely on a power source to charge up the Lion battery (and also cos it was a wee bit cheaper
) I could carry spares and buy them in stores, even in enemy countries like Germany.