Digital Video Essentials is reasonably priced, but considered to be more difficult to navigate. I agree that navigation is initially a bit tricky. But, once learned, it isn't all that difficult to work with.

AVIA II: Guide To Home Theater is more expensive, but allegedly easier to work with.

Here is a tutorial about, and comparison of these discs. The article is about the older versions of both discs, but the comparison likely still is valid.

AN INTRODUCTION TO TEST & CALIBRATION DVDS

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton