Just make sure you get one that is adjustable and dual port, so that you can tweak what you want. The Turbosmart is the neatest and best engineered I've seen and requires no tools to adjust.
I agree with Smokey, I think you'll tire of the noise. If that is why you want to fit a BOV, then I think you could better use your money elsewhere, and, unless you set it right, you will potentially lose responsiveness when getting back on the gas again.
The K&N filter suggested is a better idea and it will actually save you money as they are a lifetime filter.
CP_e Standback & PNP; CP_e 3" SS Downpipe; Corksport FMIC with Top-mount K&N filter & OEM Ram CAI; Turbosmart BOV; Dashhawk; Prosport Boost Guage; JBR solid shift bushes; DBA 4000 Wiper-Slot front rotors; Hawk Ferro-Carbon HPS Street front brake pads (@ 69,000km); Sumitomo HTRZIII's in 225/45 x 18