It's not ricey, but it is pretty stupid.
You've chosen your turbo and manifold. You want to run straight through exhaust. But you want to make your car sound like those? Well, does that mean your willing to change turbos, manifolds, wastegate size for the sound?
If so, then spend your time emailing the people who own the cars in the vids and ask their setup, instead of playing guessing games on a forum.
If not, put your flaming car together with a 3.5 inch exhaust, fabrication which means you can either plumb back or vent to atmosphere the wastegates. Then go drive it!