Ghost Ring Sights & other adjustable sights are fine for accurate shooting at distance with slugs. A HD situation is not long range, unless your house is way bigger than mine. A front bead that can be seen in limited light is ideal for a HD shotgun. You need a sight that comes up fast & does not obscure your target.
Note that dangerous game rifles have very open sights & I consider HD as the same situation. I would see how the weapon patterns with the sights on it before making any changes to it.