Check out the new "black line" of Harley Pipes from Vance and Hines. These are shown on a 2008 Nightster which is a badass looking bike to begin with and the black Vance and Hines Short Shot Staggered finish it off just right.
I have used Vance and Hines pipes for years on a number of different motorcycles so I can speak confidently in telling you that Vance and Hines makes a great set of pipes that look right, sound right and fit nicely.
MSRP on these pipes is 432 dollars but you can find a killer deal on these if you shop smartly. Click this link to find some of the best deals on Vance and Hines Short Shots around.