Hi mate,
I have the DC cat back dual exhaust system...... not the headers though. With just the exhaust, it sounds lovely! Really deep burble at low revs then a proper bark at higher revs. Also not too boomy on motorways as my daily drive!
I love it, not the best finished end pipes in the world, they are just round and big, but then again its not the most expensive system in the world either.
I know when Evo had the headers on, they said the sound was fantastic..... not sure you need them though, you not going to get a massive performance increase etc....
Anyway, lots of the other guys have heard it on the drive out, so sure there will be some other comments......