either....anymore the shaft dosn't mean much to me. alll around I woudl have to say the ACC is the shaft I like the best but it is also the most expensive. I like CX shafts & XX78's are hard to beat in general. Shoot what mathes your style of shooting & the one that matches your needs the best. If you shoot 20 yards or less all the time at deer & bear then a good old XX78 would be hard to beat, all around ACC's are a good bet & if you shoot out to long distances then the CX shafts are a great option.

Good luck & as you can guess neither shaft is always the best shaft. It all just depends.