The horn plate looks nice but it's not .750" thick either which is what I think was initially discussed as the required increase in L.O.P.

I've seen several thick ebony plates installed to lengthen L.O.P. & I think a proper pad looks better.

The S.W. Silver pad is heavy however you can normally bore a couple of holes in the butt & remove enough weight to compensate.
If the butt has already been drilled for balance the Paychmayer red pad is a lighter alternative but doesn't look as nice to my eye.

A tough decision & it would almost be worth having your arms made shorter to avoid cutting that nice wood for a pad or butt plate.