Are these arrows any good? I have shot GoldTip 5575's for awhile,I don't care for the nocks, I decided to change this year after drawing back on a 6x5 Elk in New Mexico and my nock pulled out, sending my arrow bouncing off every inch of my bow on it's way to the ground. Anyway...I shoot 28" draw at 68-70 pounds, do any of you know which series of Axis to get (i.e300, 400, 500)?