I'm a bit over the speed craze and planning on going heavier for better penetration on elk.
Not that penetration with todays bows is much of an issue. But, you say you are going heavier for more penetration and then say you are looking at the steep angled 1.5" head. Doesn't make much sense as those two statements contradict one another.
Try putting a 1.125" broadhead down a 12 gauge barrel. Really helps you appreciate how big an inch and an eighth really is. Plus it is more accurate, handles windy conditions better and of course penetrates considerably better. 1.5's are cool and all but dead animals on the ground are even cooler!
Last bull the Squaw killed was 53 yards with 50# 24.5" draw and a Savora 1.125" broadhead. He bolted five yards stumbled back five yards and went down in the exact same spot he was standing when she hit him. Don't worry about broadhead size - Worry about keeping them sharp and putting them in the right spot.
The Strikers are using a pretty good blade. Not a bad choice at all.