Curious where you farm?  Guessing west somewhere where you irrigate?  Baling dry hay with Krone balers is actually not hard on them at all.  Wet hay is what usually is the hardest on balers and from my experience Krone is the only one that can consistently do it.  I've owned at Massey/Hesston and it was a great dry hay/straw baler, but we could run circles around it with our Krone's in wet hay.  We have almost 0 knotter issues over 17,000+ bales this year on our Krone's. I think I broke a billhook but that's been it.  Biggest issue I have is operator error when loading in the twine and not tieing a proper knot and then it comes untied and I have to re-thread.  I will say with any brand of baler you need a good dealer to go with it.  I have an excellent Krone dealer and they have these balers really tuned in.  You might be better off with a Massey if you have a better dealer.  I would stay away from the new Deere baler's as I haven't seen or heard good things about them.