Go with the Scag. We just added a Scag Z with the Velocity deck to our fleet in January, love it- great cutting and durable machine. We've always had Hustlers bc thats what my brother loves, but I put the Scags at the top of the top.
One a side note, I've operated 2 Lazer Z's over the years (52 inch newer model UltraCut deck and an older 50 inch Triton deck) I did like the older- early 2000s year with the Triton deck but not the newer one. Also, the Exmark mowers across the board are SLOW I mean a lot slower than a Scag or Hustler.
We ride Hustlers and stand on Exmarks.
Stihl and Redmax Handhelds