Flechabus Suite Bus was the best (other than our own feet)! The 18 hour ride between Buenos Aires and Salta included comfortable 180 degree bed/seats (at least as good if not better than First Class air travel), snacks, coffee, hot dinner, wine, soft drinks, champagne, breakfast, and several new release movies (in English!)- all for about US$60! Movitrack's MiniTrack was a close second.
