Oh, so a DLSR
can take better HD video than a Go-Pro then
Ill admit that a Go-Pro for UW videography out competes an Intova and other action cams in the market in terms of video quality...but guess what, it also costs 3-4x the amount! So while the video from the GoPro 4s is very impressive, IMO it is not what I consider an affordable option.
Some shots with my Intova...not comparable to a DLSR, perhaps comparable to a Go-Pro when you keep in mind it costs a third of the price.
https://www.youtube.com/watch?v=YcVM9qLlHeg
https://www.youtube.com/watch?v=vwBt_KrSln4
Anyways, the point is, the OP wants a camera for macro photography. Something that action cams, Intova AND GoPro, are not suited for in the least. And a decent ($2000-3000) DLSR setup will take quality, comparable if not better then a GoPros, video while taking still shots that a GoPro would not ever be able to pull. Whether that is in the OP`s budget is up to them.
Edit: Oops, I might have misinterpreted OP's comment, my sincerest apologies if you're a dude and not a she!