Here is my two cents about the pro vs the DSP surround System discussion.
I used both of them in other cars, the difference is not as easy as it seems.
The DSP speakers are a much better value for money.
In fact it is not just 3 more speakers that are added, but a totally different system using high quality speakers and optical fiber bringing the sound.
I can tell you that you feel the difference between those two.
Go DSP you won't regret the few more bucks spent.
My only concern about all those fancy stuff is the weight of the car at the end, but that is another story
