Yo Yo:
ADAT spelled backwards is TADA, LIKE IN TA DA RA BUMP DE HEY!!!
Boy, getting old is old.
Whatever you buy, get at least 8 tracks. The Yam MD-8 works fine for me although I would bet the ADAT gets better sound; but, I predict within the next four months, there will be a gaggle of very good boxes to buy to record 8+ tracks and they will be SIMPLER to operate and the manuals, well, that's expecting a great deal, will be easier to comprehend.
I can carry on a conversation with my Hispanic friends, {I don't speak fluent Spanish] better than I can understand the ratiocinative process of those who write the manuals.
Well, listen and buy what makes you happy.
The Green Hornet