i have a full spoon N1, its loud on cold start in the morning, loud on motorway journeys and makes a kinda raspy whistle noise under slight acceleration.
I've just bought a DC5 with a N1 on. Sounds lovely. Very raspy when giving it the beans. Driving around town at low rpm's it can actually be quite civilised, however it does get a little noiser when you take you foot off the throttle.
My friend who took me to pick up my DC5 has an EP3 with an N1 on and on the way home we were going past each other at high revs. The EP3 sounded awesome, so I can only imagine the DC5 would be the same.
i had one briefly a spoon b-pipe with toda mani, gave me a head ache, but then im sure its quieter than the BC one you have on at the mo, which would probably have melted my head had i had one :xClubbed:
Very subjective area this. Decat makes a lot of difference too.
I doubt you'll benefit much from changing as the N1 is a fart can. Basically if you've got a decat then I'd suggest going for one of the quieter systems.