Sorry to take so long to respond, haven't had internet service today. The x decks used on the 700 series are C deck stampings fitted with the gearbox for shaft drive and heavy duty spindles, idlers and belt. All the spindles have zerks to grease them. The 7 iron is made with 7 guage steel and it thicker and higher dome than the X decks. The 7 iron deck will do a better job in tall grass.
Thanks Steve...I enjoy your posts...very informative...AND you seem to have most of the "size" bases covered
You may have read my story of how I have used/abused my Sears 42" 25 HP w/ weights and chains. Leads me to place brush hogging at the top of my tractor needs. Truth be told...the fact that I have now "mowed" my one mile of trails for a number of years and my 3+ acres of field (once a year) for more than 5 years...AND that I want a "mowed" look when done...I am beginning to wonder if a MMM with a sturdier deck and sturdier spindles might be part of my tractor "solution".
Also, if forced to take a lie detector test, I would admit that much of the spindle and front end linkage damage has happened not from the initial mowing pass...but as a secondary result of NOT knowing when to back off on an impediment and taking a second run at it. In other words...operator error.
What I think I should be looking for is the strongest deck (MMM) and spindles (for the "normal" roughness of the land I mow)...and use that choice in selecting a CUT that will also do the other tasks I hope to do more of as I transition to "more" retired in the next year or two. A plus to that is that while I do not want the land to look "rough" mowed...perfection is not critical since it is field and trails. But I do want it to be mowed vs cut...
From your comments, it appears that a 7 Iron deck would be on my list with John Deere product? BTW...I think I would prefer smaller deck...what is the minimum 7 Iron width?
My other needs (other than mowing 3+ acres and over one miles of trails) are a bit undefined as I have never owned a tractor. But I would imaging the FEL might get some pretty heavy use assisting in tree removal and cleanup...perhaps some pretty heavy stumps/logs to move and skid out of the woods. Also, want to do some trail and field "smoothing"...probably box blade...again I anticipate some challenging work to change the profile of dirt that has not been disturbed. Night actually be easier to find a "hill" to pull some dirt from to take to the rough spots with the FEL?
In any case...I might find the brush hog NOT to be a primary tool...in fact may be better off with a DR brush mower to go into the woods between trees on the edges of the trails and field as I look to expand the open areas just a bit.
BTW...how much additional ground contact will I find by moving to a mower larger than the 42" I am using. The number of scalping wheels may also be important?
Thanks again...I now find myself wishing I could have a JD 700 series along with maybe a 3x20 CUT

The CUT w/MMM probably should come first...I can just see myself trying to pick up the root ball from a large pine with a 700...would probably then be guilty of JD "abuse".
TMR