G'day and welcome!
I typed in "r1200s exhaust options"...nothing
then "12s exhaust"...nothing
then "silencer"...
...ah yes here is a nice little list
http://forums.pelicanparts.com/search.php?searchid=2591791
I am sure if you type in "lean" in the R1100s and r1200s forums you'll get some good stuff
dont type in "which oil to use"
or "what tire" ... you'll never get out of here with your mind still intact - heh heh
I have Remus can, the bike runs a little lean, the sound is good but I wish I had either got the Zard or waited and got the full HPE - the HPE looks wikkid
here's the list you could search for
Remus
Staintune
Akropovic
Laser
HPE
Zard
...some else may know of more, I might have missed some - hope this helps you a little, enjoy your bike!