| Re: Audio??
I don't own an XLR, but I have heard the stereo at the Cadillac dealer. It's not bad, but if you are serious about your audio (audiophile), you may not be impressed. Problem is, good luck finding someone who could operate on this car. The car's electronics are so sophistocated that even something as basic as the stereo system is near impossible to upgrade with after market equipment. Add to that, there are tweeters built into the headrests of the seats, and there's pretty much nothing you can do short of tearing up the uppolstery to remove the speakers in the seats and behind them.
In short, it's pretty much a car you keep completely stock (with the exception of the engine - you can mod that rather easily, as it's an LS6) | 
