Magnus make an awesome 2-blade! Easy to sharpen, do have some problems with bent tips but the "tanto" tip seems to help. Then again the tips bent after they had done their job...
First deer I ever shot with a 2-blade, Magnus 1, 60# Shawnee foam core Dakota limbs. Double lung and sticking in the dirt on the other side, 60 yard recovery.
When I shoot 2-blades I like them wide! Wider the better! Then again I'm shooting a bit more weight than you are also... Magnus 1, Silver Flame DS (also like the XL), and the Pearson Deadhead Wide. Looking to give the Centaur heads a try also, both the Big Game and Battle Axe.