If you don't have any trees to go around or alot of trimming to do then I would go with the RFM. You will get a better job of mowing. However, if you have trees and trimming the RFM can be a pain in the a$$. Mowing around trees your mower actually pulls away from the tree. The RFM is a lot easier to put on and take off. The MMM is a bit tougher to put on and take off. I have a lot of trees so I elected to take the New Holland 72" with my TC29D. I like the way it mows now that I have the gator blades. As far as the 60" and the 72", I had the 60" on my TC21D and I could mow closer to the ground as I have hilly train. The 72" will start scuffing if I set it to low.
murph