I went from a Gerringhoff PC 630 to Harvestec this year. Been quite satisfied with the Harvestec, does as good a job as the Gerringhoff with less power consumption. As far as maintainance, I can't really say as I only used the Harvestec on 80 acres, but the Gerringhoff was getting to be quite a bit of trouble, although it does appear to be built heavier built than the harvestec, I believe the method of chopping causes much strain on the head and combine drive, particularly in tough conditions.The RD (newer) Gerringhoffs use a differnt method of chopping, and are probably much better but appear very complex to maintain. Richard