Hello SD boy,go with the 8780,it is a very impresive combine.Try to get an XP and if this is to much make sure to get one with the constant speed rotor.Nothing wrong with a 2188 but it can't keep up with a 8780.You will easily outdo your other two combines.I am currently running two 865 Massey combines and my dealer brought me a demo for the day and set it up the proper way and it is hard to believe how much this combine can chew and do a excellent job of thrashing.