I am inexpert in the reasons people get (and stay!) married, but I agree with the posts above suggesting that the strain over music is likely proxy for the other issues. Maybe a discussion of music habits could lead into other needed discussion. Meantime, if she's seen the Dead 125 times, maybe you can buy her some of the live sets getting put out on Rhino. Some sound pretty good -- I'm currently enjoying Hartford 77 -- and might make for musical olive branches you both enjoy. :) Best of luck!!! :)