I am another one with the Evenflow Green in 6.0, and the last time I was on a GCQuad my swing speed was just over 100mph so I have been thinking about options as I am spinning the Evenflow Green too much now and losing distance (swing speed was probably around 7-8mph slower when I originally got it a few years ago)
Sounds like the RDX Blue (or maybe Ventus Blue) could be worth looking at once I am able to get out and swing a club again?
Your swing speed and mine are similar. I think both of those shafts would be very good candidates.