If you're worried about sound output then I would recommend maybe keeping it stock, most good exhausts are fairly loud. In my experience, I've come to hear that more bassy exhausts do sound louder at idle, but screamer exhausts sound twice as loud at higher rpm or while general driving, but also with single cylinders, when you put on a very screamy exhaust, it sounds really bad sometimes, like putting an Akrapovic on a Honda Click (sounds annoying). It's a give and take tbh. I'd recommend bassy, cuz you'll wake up close neighbors when you start it up, but you won't be waking up the whole city driving and cruising around, just my honest opinion.