For scope the 'best' bet is the 'Monte Carlo' rise, and you sure can whittle the PG off one of those to get the straight wrist. Your own length of neck and cheekbone will dictate (and pers. preference) what works for you. I am 'fairly long' and have tried the low comb PG Handi with scope and it wasnt right for me, though the old Shikari low comb, straight wrist was OK with the open sights. As soon as I swapped for a MC it was fine with scope, and I liked it much better. I have thought about removing a PG, yet my hand is in a comfortable position with PG for most of my shooting now, and that makes my trigger finger fall into the right place. I have found that a straight wrist requires me to bring my elbow up well high to get the hand position right, a shooting form that I dont naturally fall into anymore (probably been shooting PG target rifles too long).
So.....for eye to the sighting plane you probably want a decent 'cheek weld' on the comb, that would be the priority for me, and determine which buttstock to start with. Then hand position can be secondary and modeled to your preference as long as you started with a PG. The BC style, IMHO, is better suited to iron sights, though some have done well at long range even in spite of having to 'chin it' at the comb.
