Oh, please forgive me . . .
The guy asked "what spring do I need?"
I answered, "you must set your sag to determine the answer"
He replyed, "yea but, can't you just tell me what spring I need?"
I said, "again, you must set the sag!?"
Here is the deal, without the proper sag setting determined, you can ONLY TAKE A WILD GUESS AT WHAT SPRING. You could be right, you could be wrong, in any case you will not be taking FULL advantage of the technology by ignoring the PROPER setup procedures.
It's that simple.
(in my most calm voice) Sir, you must set the sag to determine if your spring rate is proper for your weight and riding style, once that determination has been made you can "fine tune" spring rates, SPV chamber settings, preload, rebound, pedal platform stiffness, air pressure from there.
The best way to complete these tasks is to find a copy of the manual for your bike/rear shock (I looked on the Specialized site, but because they have changed it all, I can't find it, sorry) and follow the instructions outlined in the manual.
I hope this helps you to find you "best settings"(end most calm voice)
(in most rude, pissed off voice) For everone else: You know I'm right, I know I'm right, and now the original poster knows I'm right. So stop kidding yourself, stop your crying and go set your shocks up RIGHT! (end most rude, pissed off voice)
Now what's your problem?