I'm the only one that I know of that is running some Dunlop D616's on the forums I"m part of. I personally like them. They grip and my rear doesnt feel like its gonna come loose when I lean like my Dunlop qualifiers.
I've done over 500 miles so far and they feel just like the day I bought them. I'm hoping I get some good mileage out of them.
So what are you using?