Thanks, Leon.Thanks for the info. That was exactly what I needed to hear. Will buy the 909, not the 770, for live recording. (I have a friend who wants to buy my 900.) That and the M1 DAT should be perfect for my purposes: recording live and incidental sounds, as well as performances I can't get in my home studio.
(I have a friend who makes copies of medieval instruments for a living -- better, I think, to catch her at home with all her instruments than bring her to my place.)