I currently am running 3 exmark Lazers and 1 Gravely 34" ztr riders and I would not trade them for anything. The Gravely is the latest addition since I can now ride through small gate whereas before a walk behind was needed. I have tried almost all the others but nothing is quite like the Lazer. Mainly in N. Louisiana we mulch everything and NOTHING mulches as good as the Lazer deck. Also, most Exmark dealers are true professional dealers and understand that parts are needed in inventory and service is usually next day turn around for the commercial guys.
To me Exmark is still number one but I think Gravely is getting better and better every year and and there product proves it.
Of course, If there is no good dealers around you for these products, disregard everything I mentioned and find a machine a good dealer in your sells so service is not an issue.
Samisam