Best HDCD cd's ?

Many really good HDCD's on the Reference Recordings label.

Check this link http://www.head-fi.org/forums/f9/hdcd-list-65414/
I think you'll find a bunch of good stuff.
I also am a big fan of HDCD.

Should also have recommended searching the archives here. Search HDCD in the music forums, quite a few threads.
You'll see my recommendation for Red House Records "A Nod To Bob" in there a few times. Fantastic cover cd of Dylan tunes by some lesser known artists.

I was surprised to see Van Halen on HDCD. 1,2 and Women and Children First. I could not find Fair Warning but all of these others I found at best buy. When I turned the cd over I saw the HDCD emblem to my surprise.
I will have to throw Niel Young back on and see if the HDCD light comes on. I know this particular cd sounds good and I probably did not even notice the light coming on.

I was just going to say that you may already have a bunch and not even realize it...like all the Van Halen albums.