Has anyone compared the top end CD/SACD/DVD-A playback of these devices carefully?

What do people consider the sound quality differences between these different components?

Has anyone compared the Meridian 861 DAC sound quality with the Meridian 808i? Are they equivalent?

I know some devices don't have SACD playback and others do, but don't have DVD-A playback, but how do they compare in areas where they do play back the same formats, especially CD playback?

Thanks,

Jeff