For what it's worth, Exvitermini's GT-700 doesnt run wastegates. Not running a BOV is something I know nothing about.
Couldn't see why someone who makes "big boy" boost couldn't be able to sign a "big boy" cheque and fork out for a BOV that was perhaps designed and used in a professional race series, such as Indy from the 80's?
I'm sure those BOV's, if any, are engineered precisely enough to handle lap after lap. heck, with 75 HP per cubic inch, and a lot of pressure to back that up, I'm sure there's a BOV that can take anything we have to throw at it in that neck of the woods.
Besides, had he been realistic in his comments, he would have known that your car isn't exactly the fastest and end-all or be-all of RB's, so a BOV is something I wouldn't just throw in the trash. It makes sense in your application.