Turbosmart BOV - Dual Port / Supersonic

[VegaSupra]

I am looking at a Turbosmart Blow off Valve on suprasport.com but I don't see many MKIII Supras running them. I saw one in the "Post pics of your BOV setup" thread, but I searched for "Turbosmart" and not many people discuss them on Supramania.

Do they go well with the 7mgte? The HKS SSQ comes with a full kit made for the 7M. But if I went with Turbosmart, would I have to purchase the BOV and the kit pieces separately?

Also, is there any particluar advantage of getting the dual port versus the supersonic?

http://www.suprasport.com/Turbosmart-Type-3-Dual-Port-Blow-Off-Valve_p_894.html

http://www.suprasport.com/Turbosmart-Type-3-Supersonic-Blow-Off-Valve_p_893.html

Thanks!