John Deere 630

Im new in owning hay equipment and am in the process of finding equipment. Our John Deere dealer has several 630 moco's on their lot and was wondering if anyone knew much about them? I've got some properties with 12ft gates so I'm needing a narrower discbine to through. Any other mower that are good as well I'd look at. My boss has 3 926 moco's and that's all I've ever really mowed hay with. Our tractor could only really handle a 9ft discbine (85hp pto). any suggestions and thoughts help. Thanks!
-Caleb

John Deere 630