I Have been reading all of the great info here at LS and I am convinced that the exmark ZTR's are the best mowers around(due to all of the positive posts) I do not wish to start a brand war so please refrain. My question is what is the big difference in the Lazer line? they have the "XP" the "HP" The "z" etc. I realize that you can pick + choose the size of deck and engine manufacturer + HP. But other than that what are the differences? My local dealer only has a laser Z in stock so I could not compare. I am thinking of going with a 60" deck + 23 hp kawi w/ the bagging system. I do mostly residential property. What do all of you die hard Exmark fans think??