Test drove the Tahoe and liked it but once my wife and I got in the Armada, we knew this was the choice. Lots of room inside and seemed to have a much tighter ride then the Tahoe. Love the power for towing. My wife thought it had less of a truck feel than other SUVs we tested.
Fold flat seats (unlike the Tahoe), leg room, overall ride. Base model came with most of the goodies I wanted. Middle bench seats has lots of comfort. Third row seat standard.
Too soon to tell. The only thing so far is I would rather have a beep-beep than a horn blowing when locking the doors with remote.