i have a roof diversion (see avatar)
it's a bit more expensive at about 240. i don't have much to compare it with being a bit new to all this, but i saw a comment in one of the bike mags alleging that roof have some design or another which is meant to make them quieter.
my experience is not that great - it does seem to be quite nosiy, but as i say, others may be louder for all i knw.
i think they look cool, esp with a dark visor now the sun has come out (briefly)
