Jeff B and some of the other arrow gurus will be a lot more help than me on this one but i'll do what I can. You are correct on the shaft diameter and the wall thickness with the 2314. The numbering on carbon arrows varies by company, Gold Tip, the higher the number the stiffer the arrow. Easton the higher the number the less stiff or less spine. If you are looking for the perfect arrow I would suggest an ACC from easton or a Beman Matrix. With the composite arrows you get the straitness of aluminum with some of the carbon durability. They are not cheap but IMO worth the extra money. My pro shop keeps arrows of every kind that they sell fletched so you can shoot them all if you like. Gives you a chance to see what works best out of your bow before you buy. I shoot a BK II and my bow is always above where the charts recommend for spine. I think that most of the arrow charts don't apply to todays agressive cams and more efficient bows.