Go ask Forzda about this, it's a big rumor that has very little backing. Sure, adding a new BPV makes a nice sound and will recover slightly quicker than the OEM valve, but the reports of them breaking and losing pressure were greatly exaggerated. You can save that money until you spend it elsewhere in the engine bay before dropping it on a valve. The SU/TS bypass and the Forge are both good units (I owned both at one point or another).
Next week my order is going in, the sale thread is going up on Auto trader, and the car is being parked until it's sold. I'm getting excited for something big and noisy to play with.