Here's my take: Tikka is the easy option, smooth actions, safer trigger than Rem 700 platforms, and supported by most good stock and chassis makers. Factory barrels are more consistent that some custom barrels.
KRGs can easily be milled out to take a LH bolt.
Tac A1s are probably only the best bet if you keep them in their supplied chassis - unless you really want it for the two-stage trigger.
Otherwise, a CTR gets you a thick barrel, or CTRs or straight T3X can be dropped in a chassis to take AI mags.
And, if you're wanting a field/hunting stock, the new Rokstok has a lot of design elements that will help reduce muzzle rise:
https://rokslide.com/forums/threads/rokstok-why-what-how.341147/#post-3428039 
