brokeMBA, I have a Two Bros exhaust with Power Commander on my 07 DL1000. The bike certainly benefits from the Power Commander.
In the city I putt around as not to draw attention to myself from local law enforcement and the exhaust is still quite rude. On the freeway or anything above half throttle and its downright obscene. I think its louder than strightpipe Harleys. I feel like I have the worlds loudest exhaust - thanks Two Brothers Racing.
On a side note, the wind noise from my HJC helmet is louder than the exhaust, so I have to wear hearing protection anyway...
Two Bros M5 cans