There's a lot of guys, some old line Harley guys, some noobies, who thing it's desireable for a Harley to sound as harsh as 50 caliber machine gun and have about the same db. Not me.
My V-Rod is very quiet, by Harley standards, my LowRider is not, but it's not harsh either, and I can tell you, when you feel like running it hard, the quieter bike is a lot easier to run hard, a lot less conspicuous.