I couldn't find the specs on the Farm Pro 8240, but I did find them on the Farm Pro 8020. Maybe I have the wrong site? Anyway, the numbers on the 8020 didn't really look all that great for an 80 hp tractor. Granted, when taking a quick glance at something it can be hard to compare the specs from one machine to another (There has been more then one thread concerning specs on this site).
I couldn't find the PTO hp listed anywhere. Instead they only gave you gross engine hp. The 3 point only comes in Cat I, whereas most tractors of 80 hp have either Cat II or a Cat I/II combination.
That isn't to say that Farm Pro doesn't make a good tractor. It just says the website
Farm Pro isn't very informative and borders on being a bit misleading. However, the applications list appears to be appropriate for the tractor's specs that I could dig up.
The question of weight and tractors comes up time and again. There is a way to properly
ballast a tractor that comes from determining the amount of slip generated at the tires. Often times, a tractor is too heavy for most of the applications it is asked to do. That results in wasted fuel, more ground compaction, etc.
A tractor that is going to be used primarily for mowing does not need to carry the same weight as one that is asked to plow. The problem arises when you ballast your tractor correctly for ground engaging operations and then leave all that excess poundage on the tractor all the time. What is worse is when you don't even have the option to help your tractor shed some unneeded pounds.
There is always a perfect tool for a single job. But, because most of us can't afford to buy a tool for each separate job, we must buy one that has some compromises. Define the tasks first. Determine which will be the primary uses for the tool and buy something that is strong in those areas and acceptable in the other, less often used tasks.
The OP asked for opinions concerning several specific brands of tractors. I believe he asked about NH, JD, Kubota, & Mahindra. Each manufacturer builds some fine tractors. I like all the listed tractors and my order of preference depends on the model I'm looking at. Out of that group, I would have a tough time making a choice without some seat time and dealership time.
Good luck with your search... and if I were in your shoes, I would probably go with the MX5000, a
GR Series Root Grapple , and a
Bush-Whacker rotary cutter.