Here's one that I may be the only person on earth to use.
RJ Helton - Real Life
I really only like songs 1, 3 & 9, but song 3 will tell me just about anything I need to know about a system. It has a pefect guitar and "low rider" bass. It really forces a system to handle everything from the detail of strings, vocals and earth shaking bass. It's also a 10 out of 10 fantastic recording.
The first time I heard it on a pair of Focal 816v speakers I was wondering how it would sound without the full bass that my previous speakers had, but I was actually so impressed with the details in the higher range I almost forgot about the missing bass. I do use my subwoofer for this CD.
RJ Helton was on the first season of American Idol and finished 5th. Not your typical audiophile CD to be sure.