I was looking for exactly what you described and decided on the Yoshimura RS-3 CF slipons, which come with their ''Zyclone'' baffle system.
They sound fantastic, quiet rumble at start-up and idle, a nice low growl when you're tooling around town, and a spine-tingling howl when cracked at high revs.
They do stay quite cool to the touch, and the oval can is tall and thin in cross section, so they fit just fine with my Givi rack and side cases.
My only gripe was for some reason the left one was a pain in the ass to line up and bolt-on, but the right one was perfect, don't know if it was my bike or the cans. No evidence of prior abuse, stock cans lined up perfectly. Weird.
One problem: Yosh apparently has now discontinued them for our bikes.
I managed to get a set from Hard Racing for a great deal, $660.95 for the pair.
http://www.hardracing.com/Exhaust%20...mura/Honda.htm
(very bottom of the page)
There were apparently still a few sets left when I ordered them a month ago, so if that interests you, ya might want to hurry.