Best image gallery/slideshow plugin utilizing WordPress Gallery

Hi, I can’t seem to find a decent gallery for my WP gallery. The stock WP gallery isn’t much of a gallery at all, to be honest, so I was looking for something else, but can’t really find it.

Again, it MUST use the WP Gallery, as I’ve made quite a few posts this way, and can’t really edit them, but, it has to have a ‘nice look’.

Help would be appreciated.