^^^
The first part of what you said has been proven false, but the last part has been true from day one. A BOV will *not* enhance the performance on your car one little, tiny, teenie bit! (Unless you're running 20psi, then the BOV would probably hold boost better, and work faster) I bought a replacement to test if the turkey sound would go away...nope. Now, though...I can adjust the tightness of my DV to change the sound a little (not much).
If changing the sound is all you want to do, then by all means, get a BOV...JDM Sam, RX-Kevin and a few others have working BOVs that don't stall very often, if at all. You can run it...just make sure you know what you're doing and it'll be fine!