I've got the CRG hindsight Lane-Splitters.
Fucking expensive, but I like 'em.
Bike fell over in garage while dicking around with rear stand (DOH!). Landed on the mirror and smashed the glass, but replaced the glass part and frame/pivot was fine, so they're at least somewhat durable.
As far as visibility, they're pretty good once you get used to looking down and to the side. I'm happy with them.
Check 'em out
here
-Jack