I am trying to educate myself about Silver Combines.  We raise wheat mostly in North Texas and are running Shelbourn stripper heads in our no-till wheat.  We are running Deere combines but have been told that the Gleaners work very well with the Shelbourn headers.  I have not kept up with them since the N7 and N6 series.  Can somebody educate me about the differences between the R-60,62,65,66 and R-70,72,75,76?  The new S series are probably too new for us to afford but is there a huge advange to the?.  Are their any year model differences between these models?  Good and bad of any of them?  We would probably be interested in the larger machines.  Anything to avoid?  What to look for in a quality machine? Any particular ones work best with the stripper heads?  I notice some have unloading augers that look more like a Deere or Case.  What is that?  Some factory option or aftermarket update?  Anything else that would help.  Thanks in advance.