I have drag bars and Napolean mirrors on my 550 too. I really like the seating position with the flat bars, but then, I'm used to the sport bike position. I found I slouched really bad with the stock bars.
But when I switched bars, my stock mirrors gave a nice view of my elbows and nothing else. While I was working at Dennis Kirk, I compared the Napoleans with all the other off-brand mirrors of the same style, as well as the CRG's. The CRG's were nice, but I preferred the Napolean style. And the Napolean brand mirrors are 1000x nicer than the off-brand ones. Yes they were more expensive, but so worth it. The build quality and materials are far superior.
Jeff