Hogfish video

I've got a bunch of clips from the past year or so that I haven't edited, so I put together a few. Some of the footage is from my go pro 3 black, it came out a bit choppy due to Imovie eliminating every 3rd frame to compress it to the 24 fps export setting, if anybody knows a way around that I'd love to hear it.

I'd love to get finalcut pro, it's just hard for me to justify the price at the moment. If I shoot in 60fps instead of 48, would it be smoother? Division wise, 30fps (iMovie setting) is achieved evenly from 60fps because it's an even factor... opposed to trying to get 30 fps out of 48fps.