Yup, ask Xantech and let us know what they say.
If I were purchasing a home, I would consider a pre-installed sound system as a bonus, but I certainly would not even slightly entertain the idea that it adds value to the property.
Not until I had ample time to investigate the pre-installed system and give it my personal thumbs up.
What I'm saying is that this stuff might be nice, might not. Might have been installed correctly, might not.
Either way, I would not pay any premium for a house with a pre-installed system. I would bet that most of the members on this sight would agree with me on that.
Now, the average person probly won't know better. Average person will see Bose and think they are getting a good system with the house