Re: XLR vs. AICS
I own an AI AW and six rifles in AICS chassis. Guess you could say I like them.
The AW has some things I don't think are available to the AICS, like the quick adjust cheek piece, spike and LOP. It really makes it a perfect stock for bench, prone or field positions.
I also have an XLR. The one thing the XLR has is an infinite amount of adjustability. LOP, Cheek height, grip, butt cant, pad placement, etc. It would be perfect if not for the problem mentioned above about scope mounting. I have found that a Farrell base (taller than many brands) works well in getting the proper scope height.
Bottom line though is you still have to take time to get down behind some potential candidates before you know what works for you.