Two years ago we bought a 1973 Gleaner K corn_soybean special for $2,200.00. Ours has the 13 ft. header on it. They are fairly reliable machines that will run all day if taken care of. Ours does ok with the 13 ft. header in soybeans and oats, however,a smaller header would work better in crops like grain sorghum, which we back down to 4 rows. They aren't bad machines, just don't push them, because they will slug easily. We also have a JD 55 and I think the 55 may be a little bigger. Our K has a spreader which does a decent job, but I would prefer to have a chopper on ours. like the other post said, the rear axle is a weakness, as ours has been welded up. Have no experience with the corn heads, but the previous owner of our machine ran the 3 row head and said he had no problems. The previous owner also rigged our machine up with an added on A_C from a ford truck which keeps us comfortable(pretty slick idea). The thing I like about our machine is the fact that it takes up very little space in our barn and it is easy to work on. Good luck.