So quick scan did not reveal details of what little I have learned so here it goes.
I bought a Gravely 48", wish I didn't overthink it and got the 52".
Why a Gravely? Because my local tractor dealer in Shiner and treats me well.
Having said all that here is what I learned. The first time it slung a belt, wow what a deal.
Once in the barn, saw how accessible the two belts really are.
A rope with a good handle to remove tension spring and reinstall belt and done!
Now, over time have tried to help a guy with same issue on a scag. The undercarriage on many others are so packed that field re-installs can be really difficult!
So will you be taking it in for service or are you a DIY guy?
Look at you own weight, slops on property and then look at the lb-ft of the Hydros on the mowers.
The ZT2800 would not have the torque to haul me back up a slopes we have on our property.
Mine has the ZT3200 and I service them, easy peasy to do.
Hope this tidbit helps.
Be well all...