However, ubiquitous though the V30 may be, I can't imagine Mr Paul Reed Smith being anything less than utterly through in the specification and play testing so I would expect that PRS amps have been totally tuned to sound perfect with the V30s.
Thanks for the kind words about the cab, Tolm!
You raise an interesting point about the use of V30s in the cab, too. There's a video from last year's PRS Experience where David Grissom and Doug Sewell are talking about how they spent several years working back and forth on the design of the amp and cab. At one point, Grissom says that they tried nearly every speaker on the market with the cabinet. He thought he wouldn't want to use V30s, but when they tried them, they liked the result more than anything else.
Grissom says he tried the Creambacks, thinking they'd be better, but that when they started to break in after a few shows, he preferred the V-30s. I think I understand why -- the DG cab is very warm and somewhat loose sounding to begin with. An amp that needs a tighter sounding cab (like my HXDA) sounds really weird with it, for example.
On the flip side, the DG30 is a very tight sounding head that doesn't sound near its potential with a tight sounding cab, like the Mesa 212 closed back I had in the studio. This is why I went with the DG cab. When I bought the head my dealer told me that it would need the cab to sound like it's supposed to sound, and he was right. I do like the sound of a pine cab, though, and plan on getting one for the HXDA; however it will be the closed back PRS cab for a tighter sound.
One thing Doug Sewell mentioned about both cabs is that the Grissom cab is essentially the Stealth cab with some of its internal bracing or baffling removed, along with the ports. This was done during the experimentation with the DG head. It's all really interesting!