I've been using the Edge Theme for some while and find it a nice change from the standard Win8 theme, and more Win7 like. It has a simple grey OSX-like look. I'm using the free StartMenu8 launcher by IObit.com. See my results and a link where you can get the theme.
You can get the Edge Theme here:
http://xxinightxx.deviantart.com/art/Edge-8-336348520
