I bought a Walker MDD 7 years ago. It is starting to nickel and dime me. There always seems to be something going wrong, don't get me wrong, it has been a good mower but I think I have gotten my money's worth out of it and it is close to the end of its life. I bought a John Deere z425 with a 48" deck this spring to help out and pick up when my Walker breaks down. It seems to do a pretty good job (even for a residential mower) but it was about 1/3 the price of the Walker. Well, I bought another Z425 today with a 54" deck. How long do you think these mowers will last before they start to nickel and dime me like the Walker is doing? I know that you get what you pay for but anyone use mowers like these or stick with commercial grade mowers for twice the money?