My property has maybe 1/2 an acre I need to mow. It takes me about 1.5 to 2 hours to cut, but that includes triming and some push mowing around tight sections. It has lots of irregularity, some slopes and a ditch. There are also some rough sections. I am not a lawn tractor enthusiast, I just want a reliable machine that will last a long time. Further, I don't want a big tractor, I like the size of my LX178. It seems many of the better JDs now are considerably larger and heavier.
My LX178 is just well worn. I bought it used about 17 years ago and it was used commercially for both lawn and snow removal. I have only used it for lawn care. The engine is burning oil, the hood is falling apart the hinges are completely broken, the deck is rusting out from inside out and has a fairly large hole due to the rust. Even of the the belt tensioner arms was so worn the spring wore completely through the steel hole. The transmission is good and I have serviced it multiple times. Bottom line, it's just old, beat up and every year something breaks on it and I need to fix it. So it would be nice to have something newer.
I found a 2015 X300 locally with 213 hours that looks okay, but not mint. He is selling because he relocated to a small property. If I can get it at about 60% of the cost of a new X350, I thought it might be a good purchase.
If the X3s are not as durable, maybe I need to look at other brands, because I don't want a big tractor. I just want a decent durable but basic lawn tractor. My FIL swears Kubota and his old 1993 has held up well, mind you it saw easier service.