I was playing around with a kinetic energy calculator and the jump from 150 up front to 175 up front is when the advantages of speed and energy switch. With a tick more speed and the 150 head I have more energy than a tick less speed and 175 great up front.
Blackovis has the axis (non match grade) on sale right now and still accepts the rokslide discount on top of that sale price, so I ordered a dozen last night. I hope I didn't shoot myself in the foot by ordering a dozen that I didn't test but the numbers are the same minus the straightness tolerance. I don't believe my shooting is precise enough to tell the difference in .002. We shall see and I hope I didn't waste 100 bucks if there is that big of a difference.