when i converted to 1x10, i went with a clutched deore xp rd because i'm using a campy chorus crankset and finding a narrow/wide sprocket with the right bdc was proving to be pretty hard. i did eventually find someone making them, but i've been using the stock inner 39t campy ring this whole time and haven't had a dropped chain yet, so i haven't been able to justify spending more money on a ring yet.