The AS series seems to be the hottest seller for Exmark right now. Which is odd because it is basically the old Lazer Z before they improved it. But they have made so many improvements on the AS series that the regular Z's no longer seem as attractive especially considering the price. So let's here your views on the AS series after using them for a while. I had one but at the time the engine selection was very bad (23 hp 60" weak). That was my only complaint. Now you can get up to 28 hp so that's a non-issue?