What rear shock should I by for my GS?

[Mk1inCali]

I've got a GSXR750 shock that is getting new oil/gas charge, I'm hoping for stiffer spring rate, more damping both compression and rebound, and the ability to ride hard for an hour without having a sore back.

It'll be installed this weekend if the shop has it rebuilt like they said they would on Friday.

[Flywheel]

Flywheel, do you have standard size tires or higher profile? My rear tire is pretty close to the ground with the Katana shock, but it still clears. I went from 80 series tires back to 70 around the same time, so I may not have noticed too much of a change.

I'm running Sport Demons (excellent tires, btw), but they were on before the changeover. The tire doesn't always touch the ground/floor, but I never experienced a problem with the old shock, regardless of the surface. It's possible that it's not a Katana shock, although the fit is almost perfect.

As for the collar settings, Wrecent, you are correct--I knew it was the opposite of the GS shock, whichever way it turns.