I have the same tractor but have the Rear mount Rear discharge 72" mower. I was not too sure about this mower but after using it for a few times, I have gotten used to it and really like the overall results. Especially is you have Large pine trees to trim around or a pond bank to trim up to. I have gotten very good at backing the mower in under the trees and up to the pond edge and such. My only dislike is based on my yard in locations. Lot's of tree roots to cut around, but that is a issue with any mower. If you have a large area of nice flowing lawn, the rear mount will work great. Plus - 2 minutes and it is on or off....
Hope this helps.
Mandor