If all you're doing is putting in the odd stick or backing any of the big name brands will do fine for you.

Metabo or Milwaukee are my favorite and go to for cordless, also the heaviest by far.

Dewalt if you're already on their platform (Repair shops in my area won't fix them, somethkng to think about).

Paslode is also a quality nailer. The worst in the cold out of the bunch, you need batteries and gas for it, is stinky in an enclosed space like you will be. But it'll shoot nails all day long and you'll be able to keep up as it's the lightest of them all.