So, I currently have a Z510a and it's a piece of shat! Nothing but problems. The dealer is working with me and trying to get me out of the Z510a. My salesman is a great guy and I trust him and so far he has gotten JD to help me out as well as his dealership. To make a long story short.... He has worked out a deal to get me in to a 2010 Z920a with a 54" deck. My question is, does anyone currently have this model and if so what are your thoughts and opinions. thanks in advance!