It is tough to say what exhaust is the best because it boils down to personal preference on sound. They sound a lot different from each other. I would recommend going to a meet and listening to as many as you can and deciding which one you like best. I know that doesn't help much, but really with something so expensive, it is worth the time to look into it before you purchase. There are a lot of good names out there like, invidia, nameless, turboxs, and the list could go on and on, but again it is all preference.
For the intake, if you are going to get a protune than ask them what intake they prefer to tune with.