Which windrower to buy?

So I'm looking at upgrading from my old hw340 windrower to a new one. I'm keeping my options open to which brand I'll go too at this stage but be either new holland 240 or John Deere R450 or Massey 9860 all with disc fronts. So like to hear everyone's thoughts and which has best condition rollers in them. Queensland Australia so do a lot of thick stalk forage etc. any help from the guys over seas would be nice as you guys are always ahead of us in the way of new hay gear. Thanks brad

Which windrower to buy?