Authur,
I would think that there should be some difference in POI for the two arrows over longer distances, but "mostly shooting low by about 4-5 inches at 20 yards and some of them to the left 3-4 inches" is a little more effect than .003" would have on it. I agree that you should buy the best and straightess that you can afford. That's why I went to the Terminator Select. They are .003 straightness, compared to the regular Terminator, at .006 . To be honest, at hunting distances, I didn't notice any change. All I'm saying is that I don't think that that small difference in straightness is affecting the arrow as much as Bones25 says it is. Being the economy arrow of that line, though, it's possible that his arrow has other defects that maybe causing the problem. I would just check other simpler things first, before shelling out for a new dozen arrows. Great "talking" to you! I always enjoy comparing notes with others here. Bones25 has some great info to now start finding the problem out.
Good luck,
Trebark

Become one with nature...then grill it.