Well JK I don't know if this is where you want to start, but I'll weigh in with a few thoughts.<p>I use Exmark Lazer Z's, Toro Z-Masters and Exmark Turf Tracers.<p>On the Lazer/Z-Master: <br>Do Like: Most everything.<br>Needs Improvement: The outboard anti-scalp rollers need to be on castors or at least pivot side to side. When turning they dig up turf if you're not careful. The 24x12x12 drive tires have too sharp of a shoulder causing undue turf damage when turning. The old-style "peanut" 23x10.5x12 were much more kind to turf. I'd also like to see an aerator attchment available for those machines.