It all depends on what you want your tractor to do. Ultimately what will happen (If you have a big yard) will be that you buy a zero turn to mow with, keep a 520 for a back up mower, get a C195 for a back up back up, pick up as many wheel horses that you can find and can afford, including round hoods, rare models, examples of each type, until you have all of your neighbors staring at you and wondering if you need to be locked up because of some rare OCD affliction. Fight it all you want, but this is the evolution of the wheel horse collector.