What are the "must have" HD Tracks albums?

HD Tracks is having a 20% off sale and I am wondering what recordings are worth buying from HD Tracks. I have read that there is a real range in the quality of the HD Tracks recordings and I wanted to make sure I only purchased the recordings that are worth the price premium of HD Tracks. I was thinking of buying the Marvin Gaye Collection and REM's Out of Time. Are there any others that are particularly recorded well in the HD format?