I have two acoustics with necks that are both thin and narrow.
My favourite is a 1962 Fender Newporter. It's a small bodied mahogany acoustic with a Stratocaster Neck bolted on. The sound is quite quiet and sweet, ant it records beautifully.
My good guitar is a 1957 Epiphone- from before they were cheap Gibson clones. That is a full-on jumbo and is the loudest acoustic I've ever found.

My advice- never buy a new guitar, they don't know any songs!
Cheers
Dave