x350

I need some advice on fixing my X350. I was mowing and the machine threw the drive belt. I pulled the 48" mower deck out and found the belt off on both ends and the spring was off the tensioning pulley assembly. I am not sure where the spring was supposed to attach and none of the diagrams...

Looking for a new mower and debating between the X380 and the X570 models. My yard is about an acre and 1/4 of it is about a 25 degree slope. Looking for something's that will last a long time however do not want to overspend if not necessary. Any advice between the models?

Does anyone make a good aftermarket bagger for an x350? A new one from the dealer is $675