Gallade-most SP decks will not run Expert Belt because they are dependent on Energy Gain for obvious reasons or Unown G for Machamp.
I think that there are better Stadiums for an SP deck than Snowpoint Temple. While Snowpoint Temple does give a nice 20 HP boost, that can be used to your opponent's advantage if they are playing an SP deck. Plus, some of the popular decks right now (Flygon, Beedrill, Gyarados, Gengar) all run more than 1 BTS, which they will play as soon as possible and make your Snowpoint Temple useless. I think that there are better stadiums for SP decks, such as Galactic HQ, Champion's Room, and Pokemon Contest Hall. If those do not seem to work to your advantage, then you can take them out and you have spare card slots in the deck to work with.