What are you filming? Might make a difference on suggestions. I have a GoPro, and it's pretty sweet. I use it to film band practices, gigs (the sound quality is pretty good, especially for loud shows), and a bunch of useless stuff that my friends and I get up to.
So any variables and absolutely zero information... There are probably a hundred-thousand guides out there on which camera suits what kind of activity. From still-life filter-flooding to crazy-shaky-Cloverfield skateboard vids. Or just get a GoPro and a drone. Cost a pretty penny but holy shit does it take some sweet vids.