Tbh there aren't many "bad" sounding setups for the EP3, more a case of what your tastes are - some setups are definitely raspier and more aggressive, and how much volume you want.
Personally I run a very raspy setup (unsilenced B pipe, unsure of make and a custom straight pipe "backbox", as loud as it can get without a race manifold and decat. It drones, sets off car alarms and pops and bangs like mad, cruising at 60/70mph and then changing into 3rd or 4th makes it pop and bang like it has antilag - it's a far more aggressive setup than most owners (or neighbours!) would put up with, but then you have horses for courses. I wouldn't want a quiet or discreet car, but it's all down to taste.
The best thing you can do really is go out and hear some exhausts, not just on CTRs but all kinds of cars to see what kind of noise level would be acceptable to you. There is more than likely a local Japanese car club in your area, visiting them on a meet would be a good place to start!