Hi Chris,
I was like you and was debating for a long time whether to go for a new Zephyr or used older rig.
After spending countless hours looking in the forums and doing extra outside research myself I opted for the latter and bought a used Clipper 24.
My reason and popular consensus is that you're barely able or unable to fly the cinema cameras such as the Alexas and heavier cams or anything with a beefy lens like an Angenieux Optimo or Fujinon zooms, or a camera with typical wireless/essential accessories I.e. FF, mattebox, Teradek, etc.
But of course it boils down to which cams you'll be working with and wanting to deal with weight wise. I went with the latter to have a wider range of options since mine can hold up to 35lbs. aka 2.5 stone