I have the pacesetter header, 3in cat, 3in hks dual tip exhaust and the whole thing is very quiet. Although the header probably has an effect on sound i'm sure the muffler has more of an effect. Just listen to any honda civic with a trash can muffler and stock system.
Although mine is a 7mge and this is a 7mgte, it still sounds about the same with the turbo keeping things a little quieter.
http://www.suprastore.com/hkstuex19to1.html