We have a pair of 2600's , 25'and 30', they are even painted green (Deutz). The 30' looks good behind the Steiger anyway. These disks are basically good. For primary tillage I would stay with the 2600 series, larger blades, wider blade spacing and more weight per foot for better penetration. look closely though in the area of the transport wheel modules, if these aren't greased daily the bushings wear ,pins, etc. We do find in heavy irrigated corn stalks(BT),the best results are when we shred the stalks first, it lets the residue flow through and just leaves things nicer for a one-pass in the spring. Good-luck, Mike