We have a smaller farm and are looking into getting a gps for the tractor finally. Not looking for something insanely expensive and I stumbled across the trimble ez guide 250 and ez steer. Looks like it all together would cost somewhere around $4000. The accuracy says it is 6-8" using the SBAS. My question is that would it be worth it to upgrade the omnistar xp, I'm just worried that maybe it's not good enough? Most of our fields are very flat so I don't think there would be much of an issue with accuracy on hillsides. Just want it to be accurate enough to plant and drill with, on a average year we only drill 300 acres of wheat and plant 200 of rowcrop. Any opinions or suggestions would be great thanks!!