Well, the small details will very much come down to personal preference.
I really like KRGs chassis, great ergos, great attention to detail and great overall feel. They are also very helpfull, not that I have had to reach out to them all that often, but when I have, they have gone above and beyond. There are a lot of nice chassis out there these days, but to me, KRG and Accracy International still stand tall.
To me, feauters I grade as a must have are:
Lenght of pull adjustment.
Comb height.
Recoilpad height.
Nice to have feauters are things like:
Folding stock.
I dont shoot PRS so all the adjustable and add on weights are not something I care about.