So I'm building a human paladin for a vanilla 3.5 game. The game starts at level 6, but I'm not going beyond 5 in paladin. I'm wanting to build a mounted combatant, and I already picked Power Attack, Mounted Combat, Ride-By Attack, and Spirited Charge as my feats. Now, my question is this: Should I prestige into Grey Guard or Cavalier? On the one hand, I like the continued casting progression of GG, as well as their ability to eventually smite anything that moves. On the other hand, the Cavalier's bonuses to mounted combat are muy desirable. So... which way should I go?