Powergrips were my first consideration, my LBS also carries them so it wouldn't be a problem getting my hands on them, they also carry MKS Sylvans so I can pair those up.
I've never ridden except for when I test-rode my friend's SPD's on his Trek MTB. They really solid but I'm split 40/60 Powergrips/Clipless right now. Can't make my mind up.