Check out the BluRay releases. They're sooooo much better than DVDs, especially in terms of audio quality. You probably expect video to be better but may not have thought about the audio quality. In my opinion, the audio improvement is even more striking than the video upgrade.
I will definitely do this! You're right - I hadn't thought about audio quality improving with Blu-Ray, only video quality.
LoveJB - I would DEFINITELY prefer to be at a live concert as opposed to watching the concert on DVD, but with ticket prices these days, that's just not an option anymore! But with a really nice home theater system, you can have just as much fun (or at least I can) watching it on a big screen TV and listening to it loudly enough to wake the neighbors! Bonus: The beer is cheaper!