I would suggest that you remember that with wedges you don't tend to hit them full the vast majority of the time. As a result i would always recommend that you play a softer and slightly heavier shaft in your wedges for feel purposes. I always played 6.5 rifles in all my clubs, now i have 6.5 in my irons and 5.5 spinner's in my wedges and these give the feel/feedback i'm looking for in my wedges. I
If you are going well with the X100's in the irons i would go S300 in the wedges, if i was you.