I have an opportunity to lease a 2015 Q50 Signature Edition at a terrific price. I was shocked however to see that it has only a 6 speaker Bose sound system. Does anyone have any experience with the regular 6 speaker system. How does it sound? Obviously nothing like the premium system I'm sure but it is Bose! Can anyone tell me what the system sounds like?

I was looking at the same car this last weekend. The stereo was a deal breaker for me. It is not as nice as the ten speaker Bose system in my q40.
The six speaker system is a huge downgrade compared to the fourteen speaker Bose system in the premium models.

However you have to remember, if you were driving a car that just has a stock stereo, the six speaker system will be comparable. Similar to a stereo you would get in a new Accord. It's not awesome, but it beats the hell out of the stock stereo systems in a Subaru.