Using any Rush disc pressed since Moving Pictures is probably not going to provide a real useful test. They are horribly mastered and compressed/clipped to the point of silliness. I can't imagine it getting much better with "remastering." If you said it sounds good, then someone must have pulled a rabbit out of their hat in the remaster stage.

You might try something a bit more dynamic like a live jazz recording. Getting a whole new system is always good for some serious quality time as you listen to all your old favorites and hear things that you didn't know were even there. Welcome aboard!

Cheers,