one advantage in preserving harvesting history is that all combines don't work well in every field. i live in central ontaio, canada and we have hills called drumlins for our farms... these hills are formed from glacial action and they look like hog's backs some of these hills are steep and only good for trees and sheep(friesians, of course). anyways we run a 4400 and i'm not sure i would want a bigger machine than this i like our machine on hills also preserving older combines teaches us a lesson in mechanics the art of maintenace and restoration are valuable skills when steel is becoming more and more expensive to produce it's a great feeling to go out in an older combine that is working well like flying an older airplane....there is a thrill in knowing the machine inside out and often upside down so i'll say i'm all for preserving harvesting heritage but try to keep the old machines in the field --Mark in canada.