Opposite ends

One of the things I enjoy most is listening to music from my youth and enjoying how much fuller, clearer and better it sounds on a stereo i could have only dreamed of when first heard those songs...

Then there are those favorite songs that sound pretty much the same...no new layering, depth and width of soundstage...

So at one end for me is Aqualung...can play it louder, but still kinda flat. On the end is Behind Blue Eyes...I hear stuff in there I never heard before...

So what old song do you wish sounded better on your stereo, and what old song sounds as good as you could possibly imagine?