I usually use muzzys and shockwaves, but recently bought my first 6 pack of 125 grain thunderheads. Two of the six heads wobble on my arrows, while only 1 out of 2 dozen of my muzzys have wobbled. I'm not sure what it is with NAP, but one of my six shockwaves have wobbled also while I spun tested the arrow. I would sway towards muzzy for a couple of reasons now after seeing the thunderheads. I like the point on the muzzy's better, I like the way the broadheads seat in the muzzys better, and they seem to be manufactured better from what I have personally seen. Just my 2 cents.
ArcticBowMan's Hunting Photo's