Hello Captain,
How far away are you sitting from your M80s? The dispersion of the M80's tweeters and midrange drivers should be sufficient to supply all those details you believe you're missing. All of this makes me wonder if you've checked the "bi-wiring" gold links at the back of each M80 to ensure they're connected, secure, and that all your tweeters and midrange drivers are working.
Play some pink noise or musical selections with lots of cymbals and percussion and put your ear close to each driver to be certain it's working.
Regards,
Alan
