When I went shopping for a lawn tractor a few years ago, the JD website suggested the X350 for my lawn size.
Before plunking down 1000's of dollars though, I did my research. I read everything I could about reviews, complaints etc.
I found a lot of complaints with the X350 with one particular issue. People said after about an hour of use the rear axle got
pretty warm. To me, that says flaw. Parts that get hot wear faster. So..... I looked into the X570. The only complaints I could
find at the time were that the headlights aren't bright enough. Not a big deal to me and it's easily fixable with better bulbs.
Did I make the right choice? I think so. My X570 has performed flawlessly since I've had it. I did have the dealer come back
after purchasing it to make deck adjustments so I could actually cut the grass to a 4" height when set at 4". It was cutting it to
3.5" when set at 4. That's critical to me, I don't like weeds and it makes a big difference. And yes, as stated by others, don't
buy at a big box store. Contact a dealer. Hope this helps you with your decision.