I just purchased the 24/96 wav and really like it. Thankfully I do not have a ripped CD version to compare it with.
I also just purchased their HD version of Born To Run, and after comparing that with the my ripped CD version (the Gold, Master Sound version no less) there was no comparison, the HD version was much better.
Unfortunately it does seem to be hit and miss. Unless it is a favorite album of mine, I've generally just been purchasing HD versions of albums I do not already have.
Oh yea, the Clash's London Calling in HD was one I liked better (but not tons better) than my CD rip.
Cheers