Babs: You have your answer here already, 400 or 340. Which one will depend on how much you front load the shaft. I like 340's for that weight of bow, I have a 29.5" draw. The reason is I like a heavy arrow around 12 gr. per lb. of bow weight. My total arrow weight is 670gr. You just cant imagine the penetration of that set-up with some good sharp 2-Blade Aboyers or 3-Blade Terminators. If you want a lighter total arrow weight, say around 10 gr. per lb. of bow weight, you could shoot the 400's OK.
Either one you choose will work, I like your choice of shafts, my personal favorite, for toughness, accuracy and penetration, you cant beat them. Good Luck....RW