I did the same, bought a Z Master, just got real tired of always removing an attachment and what I needed to use was never on the tractor. Must be a Catskill thing.JD says the MMM and the BH are not compatable. When I had my 2320 I also had the MMM and the BH. In order to put to BH on I had to remove the front mounts for the BH under carriage. They mount to the FEL mounts on the tractor. It wasn't that it was terribly hard to do but it wasn't "tool less" and what invariably happened is that the lawns would go unmowed because once the BH was on and the arms adjusted just right we became reluctant to remove them, besides the fact that the nuts are not designed to constantly be removed. Remember too that you have to take off the FEL unless you want to mow with that thing bouncing up and down! So there's considerable work to make the transition in my view.
On the 2720 the frony bracket arms for the BH take much more work to get off.(I don't know if the new 2320 has the better arms). I went with a Ztrak to do the grounds and I like this option much better. Several people have commented that they have done the same.
The lawns get mowed and when I take the BH off to put on 3pt. implements it's an easy transfer.
It depends on how much BH work you do and how much mowing you do but the MMM runs about $2500.00 (more if you get the hydro lift which drops out half the time) and for another $1000.0 you can get a Ztrak that is much faster, gets in and out of places better and has a wash out port for the deck and other options that tilted getting it over the MMM for me.
One more thing. I can take out the Ztrak when the lawns are still a little damp from the rain and it mows fine. I wouldn't take the tractor on the lawns if they were even slightly wet and we get lots of rain here!
Rob