H80Hunter:
What length would you go with? is 30" probably ok? Or eould you go up to 30.5"?
Your question would be answered best by a shooter that is using a WB with bow specs the same as yours or near the same as yours.
Restricting my comment to preferred arrow length only; I cut my shafts to a length that keeps the particular broadhead I have mounted at least ½" away from contact with my riser. Doing so keeps the broadhead away from my hand and allows different diameter broadheads to be used on the same shaft length.