just sort of wanted to chime in about the Cheetah/Polaris LS
The M-Polaris LS will give you the cheetah flight, but the pro plastic currently used will break in faster than DX
The Sirius Polaris LS has a little more stability to it, but I think this just has to do with the plastic. It takes a little more to get it up to speed than pro plastic(as generally is the case). It is still a great fairway driver in premium plastic. I generally think a Star Cheetah would result in similar changes, compared to baseline plastic(or even KC). The current star stuff, or what they used for sirius plastic, gives the disc a much denser feel. It makes the disc appear more stable and have less glide(not I said appear). Im sure people would nut on star cheetahs but don't expect the same flight pattern.
If you want a really good Polaris LS then I got a secret for you. The current run of 1.8 QJLS are actually Q-Polaris LS. They are opaque yellow and easy to get up to speed. Find those and you got yourself a durable kc pro cheetah replacement