Adding on to my thoughts from above. I think it's a bad shader or something along those lines. The stuttering performance doesn't happen when I look up at nothing in particular. If I look at the ground, the stuttering comes back. I have been able to make the game playable by setting my vsynch to 1/4. Sometimes I can get away with 1/3, but most of the time I need to be at 1/4. It doesn't seem to be related to how good I set my graphics though. I am working on changing my settings based on the CPU usage (like I turned single strand hair physics and such). Will continue to test.
Testing continues: Taking off strand hair physics seems to have helped a lot. Dropped my CPU usage down and I'm not having as many issues. Could be where I am, though. Will continue to monitor.
Ok, it's not necessarily when I'm looking up....it appears to be when I'm not looking at the back of my character. If I swing my camera around to look at the front of my character when the sound starts to stutter, the stutter stops. Not sure what that means. Will continue to monitor.