I can't help you with the 72" model. I would've preferred the 72" model but I found a good deal on a 60" Air Tunnel Landpride (AT25-60), and I like it very much. Here is some information on my 60" model for comparison:
Clippings: The clipping distribution is excellent; however, I must add that I keep the discharge chute flipped up in order to get closer to obstacles. I'll have to mow with the discharge chute turned down one day to see how it does
Cut: I would rate it excellent.
Speed: I mow approximately 1 acre per hour with the 60". The mower could handle a faster pace, but the tractor ride isn't very comfortable at high tractor speeds.
Hope this helps.
Kelvin