I'll keep my stock exhaust, I like the sound of quiet... and with the $500 - $800+ I save, will invest in other improvements. But that's just me.
Yes, I found a used black non-metallic paint tank and side covers from Japan. Black is the easiest color to match bodywork. The tank cover is Bagster from France, and handlebars Honda Japan.
Next is the MIZ seat tail kit. Black, of course.