I talked with the dealer, where I purchased my MF1528, and asked him if the 1528 was going to be discontinued, And he answered yes in favor of a new model 1529. I asked him what the differnce it had. he said, it was to have bigger tires and wheels, he just didn't have all of the spec's yet.
Sorry to hear this,but they do like to change things.
I went to the MF web site, and it looks like the 1529 and 1532 are only available with gear drives. I can't imagine them not offering a hydro in that hp range; it must mean they will be coming out with the hydro's later?!? I suppose the 1528/1531 hydro's will be available for a while yet.