I have always felt very comfortable with the AI platforms. I have had 1 AIAT chassis, 1 AIAT rifle, 2 AIAW's and many many barrels between them, so that is to say I have some time behind them. I prefer the AW style skins (thumb hole) a bit more than the AX or AT (pistol grip).
Thanks. I feel like I will miss the thumb shelf. There is some aftermarket options but they don't work with the non folding stocks. It's what I'm getting unless they find a McMillan that is right for me.