WARG , I have the same pipes , love them . Just got my front end done and let me tell you it makes a HUGE difference in looks on the bike . So good now I think I need wheels !
Definitely go with the front end. You're bike is already makin' noise goin' down the road. I'd customize the stuff on the bike that hasn't been done yet. Then go back over it and change the stuff you want changed. It will give your bike a more "finished" look.
I'd do the front end first. Like said, you already have a good lookin set of pipes. Might as well get the front end to get that out of the way, then change the pipes.