I was down at the expo in louisville and saw the gravley 34z and think it may be the ticket. Right now I've got the JD GS30 36" wb and it's a great mower, but it sure gets tired walking behind that thing 8hrs a day. I was thinking about getting a proslide for the JD but after seeing the 34z it might be worth the investment. Wondering how the gravley lines are and any input on the 34z. Also, if I were going to sell my JD what do you think I could get for it. It's a 2004, 150 or less hours, bagging and mulching kit, gator blades, 2 sets of factory blades. new around 2800, I was thinking of selling it for 2200 or 2300??