I went with 177 Karmas. I'm 5'9" 167 pounds, and in hindsight I'd choose the exact same ski, but I'd have gone with 169's. The karmas are very stiff and the 177's are a bit hard for me to press on.
they both ride all mtn...but like everyone is saying if you are heavier get the karmas because they are stiffer and if you are lighter get the foils cuz they are softer