After years of experience with z turns both while working for other Landscape companies and useing rented Zturns for my new Landscape company I have decided to buy my own first Zturn. Limited down to the Exmark Zturn 44" or 52 ". Both used units with around 100Hours. I think they are both 2003 models. I am leaning towards the 44" since I am new with my own business and most of my accounts thus far are small residentials...less than an acre. Are the Exmarks good for leaf collecting for spring and fall cleanup? Do I need to have the ROP option added to this unit? Should I stay with the turf tires or get the aggressive tread?