Okay, I'm going to agree AND disagree with your post Sactown.
I would say that IF you are ONLY throwing Track equipment, the AR is a ball that should be in your bag (GREAT ball for sure). However, 2 or 3 of them? Come on!
I had 2 of them at one point, one drilled pin right of ring with cg kicked (heck of a ball) and one with pin over bridge, cg center of span (turd!). I dulled them both, I threw the both OOB, and I polished them both at different points... I found that this coverstock is simply not THAT versatile. Polish or not, it tends to lose lots of energy if there's not a good amount of head oil on the lane.
The ball carries most every pocket hit with ease... until the head oil goes, then she starts leaving single pins and splits.
Overall I loved this ball, but I found it to be pretty "condition specific". So, to sum it up (LOL!), I would say that all the "Trackies" need to have this ball... But one will probably do.