I currently have a John Deere LX188. It has been a good mower up to now. It has a Kawasaki engine, hydrostatic, power bagger. I think the hydrostatic transmission is going out. It sounds like parts might be hard to get for it and will cost more than the mower is worth now. It must be over 20 years old. So what would be a good replacement in a similar class of mower?