i've used beman flash in making up my daughter's arrows. they're just ok.
imo, the beman ics bowhunter shafts are by far superior, and cheap. another good consideration are the ce predators from braveheart archery.
with a 30" draw, most carbons around will be 31.5" in length, and i dunno why you'd need a 32" arrow. anyhoo, considering the arra spex you have in mind along with yer bow's holding weight i guess the 400 size spine might be a starting point.
or, you could spend the buck$ and get a 6 or 12 pack of ad trads and be done with it all. they WILL work for ya. no guess work. period.
after all the theory, speculatin' and guess work, it always comes down to trial and error. always. good luck!