In my opinion stick with the Z2.
While Rotors are a nice hopper, I've had better luck when it comes to not jamming with the Z2 than with the Rotor.
Although, I play with a Spire.
Just my $0.02.
You may call it fat, I call it bounce padding.
Dynamic broke meter (relevant when adding when trading): Moderate - I could add in the range of $20