The only diff. in the 2620 to the 2920 is the engines with 3 HP diff. The statements about whether a tractor can handle an cetain size implement is somewhat arbitrary and definetly up to opinion, mostly your opinion. Granted there are limits, but the lines are not hard, what is really meant by "handle". So here is some food for thought. I moved up from a 17HP
B7200 to a 26HP
B2620, that is a 53% increase in HP. However, I have run all the same implements on both tractors. 4' Brush cutter(which is what the owners manual lists for the 2620/2920), 9" PHD, 60"MMM, 6' Blade, 6' Landscape rake. The
B7200 is listed as 1356 lbs and the
B2620/2920 as 1554 lbs. Obviously the 2620 has the power advantage, but I was never dissappointed in the 7200, it "handled" everything just fine. I do not connect the cenert link when I run the BC, with no extra front end weight it really doesn't work. I also think it mows better over uneven ground. I tried letting my feild grow up and mow it with the brush cutter and was very dissappointed in how it mowed. The grass would lay down where the tires ran over it and not get mowed and stood back up the next day. There are several posts on here about this. However I have a freind (
BX22) that had the same expeirence and now we both mow our fields with the 60"MMM and have better results. You can't let it grow as tall, but it mows it down fine. Which may be better for your HOA and neighbors that you don't let it grow as tall between mowings. From the sounds of your land you have alot of mowing to do 6A? Wow. I am wondering if you have considered a seperate pull behind mower that you can offset to the side and make 2 passes at once or double your width. I am sure you could pull a 5' Brush cutter with either 2620 or 2920, maybe not lift it without front end weight. When it comes to "handling" it comes down to how tall you let the grass grow, how wet the grass is, how dense the grass is, how fast you want to mow it and how many times you have to mow over it. So as I mentioned the "handling it" is whether you are satisfied with its performance.