I've run open, I've run closed........................ I'll take closed anyday.

If you're not maxing out the capacity of your exhaust you're not going to gain anything but noise with an open dump. It's a little more work to run a recirc'd WG, but the effort is worth it if you want your car to sound good/quiet. You can recirc your dump in a location and angle that will actually increase the efficiency of the exhaust as well as keep it quiet.