Do you want a mirror to appease the rules and not look too bad on the bike or are you looking for something that truly works better than stock? There are two aspects to think about - clarity and field of view. I've only tried a couple of different Rizoma mirrors and they didnt have a decent view at all. Personally I wouldn't use them. The clearest view I've experienced is with CRG Arrows. They look great, compliment the design of the bike, have the clearest (no buzz) picture, and the convex glass gives a full wide view of whats behind you. I hate not having a good mirror so I only use stuff that does the job of giving me a good picture of whats going on - The CRG is better than the stock mirror by a big margin and the stock mirrors are better than the Rizoma models I've tried. I have CRG's on every bike I own.