Well I installed the type RS today. It holds boost great just like my Forge but its too quiet for me so I'm sticking with the Forge. The Greddy is just a bit louder than stock (I only used it in full recirc mode) and makes more of a whoosh sound than stock. This valve I think is perfect for anyone that wants the performance of an aftermarket valve without the noise.
I have a for sale thread up for the valve with install kit if anyone is interested.