You can't beat the look of the new full roll bar that Superformance now offers as an option. Here's a link to Ken's SPF.
http://web.mac.com/pbmracing/iWeb/PB...l?slideIndex=0
Personal preference, but I don't like the look of the dual roll bars. I haven't taken delivery of my car yet, but if I was ordering a new SPF I'd go with the full roll bar.