Discbine size for 2840 or 1755 oliver

I am looking for suggestions on what size and type of mower I could power with my existing tractors.  I have been running NH 495 haybines.  I have a great NH and Kuhn dealer close, otherwise its a two hour drive to a Deere, CIH, or Vermeer dealer.  I'm trying to figure out how much more I could cut per hour or day.  Thanks,

 

Discbine size for 2840 or 1755 oliver