I've finally made my decision that the 19º 910H is the right club to fill my gap between 3i and 3W. With that being said, I need some pointers or thoughts on shafts. 

I swung the 19º in the LM today, I was averaging 107mph with the 910H which puts me (based on UST's graph), dead center on the Stiff 104g shaft AND on the lower end of the X-stiff 104g shaft.

Current Gamers:
Titleist 910D3 (280-300yds) - RIP60 66g X-Stiff
FT-Tour 3W (265 yds) - Fujikura E370 75g Stiff
DG X100s in my irons 3i (225yds), 4i (210yds), 5i (195yds), 6i (180yds), 7i (170yds), 8i (160yds), 9i (140yds), PW(125yds)

What do you guys think? I'm looking for a shaft that favors control over length which points me to the X-Stiff, but I don't want to lose the higher ball flight that gives the drop and stop that I'm also looking for.

The 104g UST Mamiya Proforce V2 is the shaft that feels the best in other clubs tested. Just can't decide between Stiff and X-stiff because of the overlap.