You are better off keeping the Z760. It's a great camera and since it takes the Li-Ion battery, you won't be constantly buying new batteries.
When looking for a digital camera, no matter the make or model, always consider the batteries it takes.
I've got two digital cameras, a SONY and a Kodak, and they've both got the rechargeable lithium-ion batteries. I've never run out of battery power. Just make sure you have a backup in those circumstances where you will be using your camera at long intervals of time and you'll always be prepared.
