I have the carbon fiber HMF highmounts besides sound and looks , They dont get hot even after 6 hrs of riding you can still touch them , I rode to pa about 3 1/2 hrs with soft luggage touching the cans , and no damage , even after an 800 mile round trip no melting of the luggage no damage to the cans , wipe them down with maguiers dash foam (uv protectant ) when I wash it carbon fiber is the way to go ,
With CF you do need to be aware of the packing.. This is especially true if you ride the motor hard (sustained high RPM). If the packing burns out, the can will soon follow..
I have Titanium myself.. pretty trouble free