It helps you to save Stat points.
Maxed holy shield will last for long enough. (I think you'll have at least level 30 holy shield)
Stack up for Pally Combat Skills, it helps FoH, Holy Shield, Smite, and others (You might charge, zeal sometimes.)

You will choose between two shields, Storm, or HoZ.
HoZ will do more dmg, while SS gives the DR and other well known benefits.

The range of Smite depends on the weapons. So, some people would go with Silence Berserker Axe (Range 3), and have some IAS gear, or Silence Phase blade (Range 2) but PB will require some Dex.