I have the same bike. I noticed the same heat issues and switched the stock cans out to the FMF Hard Parts mufflers. Lost about some weight, had to re-map, gained some low-end, good sound, no more heat issues!. Then I decided that I needed the Neduro auxiliary 2.2 tank, so i got the Remus 2-1 system. Lost a bunch more weight, good sound, no further re-mapping needed, and I can go 300 miles on one fill up.
Tons of options out there, let me know if you are interested in the FMF cans at a good price.