Like a lot of us I've spent quite a bit on mirrors. I've found the Rizoma article good quality & long lasting, but it ain't cheap. I've had many Napoleons, cheaper, & pretty good, but they don't last. I have, in the past, tried bar ends - good views behind, but not happy with them & reverted to those that use the switch block mirror mount. The stock mirror is a good mirror, but on stock bars I get a great view of my arm & shoulder. Found by accident that the stock is great on low bars. There's an interesting mirror thread on grisoghetto.com you should check out - Beatle has now settled for the glassless versions from motogadget. They look the business.
Here's my setup -
