I got my 30mm risers from loadedagain (on this site). I can't believe the difference. I'm 6'4" and it was a real pain when I stood on the pegs, but not since I got the risers. Much more comfortable riding position for me too. Seems like the handling is better but that might just be that I'm getting used to the bike.
'12 BMW K1600GTL
'00 BMW K1200LT Trike