After lusting over 710, 810, 910, 980, 1290, etc. for over 10 years, I finally got around to pulling the trigger a couple weeks ago on a pair of L980s I had a lead on for a few months. For the past couple days, I was adding my impressions to an old thread on AK, then asked about the biamp feature. That's probably not the target audience there, so I figured I'd post here, likely to get a more accurate and comprehensive response.
I've read just about every thread I could find on the biamping feature of these larger ADS models, and there is not an overwhelming consensus one way or the other.