Then it's a DP you need. Plus as you have a GENII you will need a 200cell cat. That's been my experience.
There is a sound change, it is subtle, a deeper note, you will notice it but your neighbors won't.
Any DP made for an MPS will get what you want to achieve. It's just that some companies build them differently.
I have this one from Best Mufflers...it has a single housing on the back of the turbo.
Where as you can buy this style which splits the wastegate from the exhaust (I think
) This one is for a Ford Xr6, but the design is quite similar.
I'm sure Troy will pipe up shortly with some advice.