Good day.
Congrats on the MX. where’s the pics?
I can’t speak to whether a 2772 is more rugged than another brand or version, but an MX will run that with no issue IMO unless you are trying to grind stumps with it.
The weight of the implement is no issue for an MX IMO.
Depending on your hills and direction of travel, you may want weights or loader in for front ballast. I have some very hilly spots and have not had a problem but I leave my loader on. YMMV.
PTO power for me has not been an issue that is cutting thick saplings, 3’+ tall wet grass (waterways/trails)…it is just fine if tempering the speed…only time I have stalled is with a stump that I would have seen if not for tall grass

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All Of that being said, if you are planning to roll down the road and high HST range, do so at your own risk…if the road not smooth, you’ll know it is back there. To me that’s the only concern, but I don’t think that is brand specific.
Depending on how aggressively you use it, the rear guard may require some lovin’ periodically.
Taking the covers off to service is really my only complaint. I understand why they are there though.
The LP 2772 has done all I have asked. I have bought more property since getting the cutter…originally it was for woods and trail use mainly, now I have a pasture. I wish mine was wider now and believe Mx has plenty of power to handle wider. I would buy a wider cutter now with no hesitation.
Good luck.