I definitely agree that spine must be consistent throughout a set of arrows, however, I firmly DISagree that straightness is not equally important. If not, why would the most accurate arrows in the world be +/-.002 and not +/- .006?

Take two sets of arrows, both with consistent spines, only one is straight within +/- .006" (.012 TIR - Trads keep their wood hunting arrows straighter than that!) and the other is straight within +/- .002" (.004 TIR) and the straighter arrows will tune easier, group better and shoot more accurately - especially with broadheads.

As TFOX said, if the insert and nock ends of the shaft aren't straight and concentric with the body of the shaft, won't any arrow shoot worth a darn, no matter how consistent their spines run. Again, that's especially true with broadheads. That's the downfall of most carbons, straightness at the ends. GoldTip is aware of that problem, and the fact their arrows are not straight and concentric on the ends. On their tech sheet, they instruct people to cut their arrows to length by taking half the amount they need to cut from each end. Extra long draw guys like me that can't cut anything off a raw shaft are screwed.

The higher arrow speeds you shoot, the more precise your arrow has to be, along with having to be dead nuts with your bow's tune and your shooting form.

The thing about the Matrix arrows is they are removing one source of potential concentricity problems by eliminating the counterbored portion of the insert and using the body of the shaft itself to support the shank of the head. Good move, as far as I'm concerned. It basically turns a screw-in point into a nib point. Great concept!

Eliminating the shoulder of the insert also eliminates one of the biggest causes of cracked ends. When you hit something hard with a standard arrow, it can drive the shoulder of the insert up the shaft. The HIT insert is well up inside the shaft and has no shoulder.

Two facts that run in favor of the Matrix: I've seen very few Easton arrows that didn't come in well below their published straightness specs. JeffB is impressed by them at his last report and he's as particular about his arrows as I am. So, what Easton's got here looks like a very good arrow.