I am considering buying a new mower for my home and business use. Thinking along the lines of a four wheel steer, whats the pro's and con's on this? Know for a fact I wan't at least the X324 with the K58 tranny but maybe 4x4 should be included too? I am all ears on this and would consider up to the X749. Anyone have one of these 4ws models X324, 534, 724, 749?