best pull type swather?

I've been looking around and doing some research on some different brands. I'm a massey fan so leaning twards a massey/hesston, but am open to any brand. We have a JD 5115m we pull a 10' NH hay bine with but it's getting old and we are taking on more acres so we are looking to upgrade to a disc mower. Any suggestions we will be doing around 400 acres within the next few years



best pull type swather?