This looks almost identical to a golem deck I have. Looks pretty solid. But I would personally add some Vault Skyward's either side board or main deck. That way, if you have enough golems on the table, you can potentially slap them with alot of damage. Also maybe some Strength of the Tajuru for buffs. Remember, Precursor effects all golems on both sides
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If you're using Turn aside to cancel spells targeting a golem with Precursor on the table. It doesn't work. Spells are copied as their cast not when they resolve. I would suggest Vines of Vastwood or Ascetism to prevent golems from being targeted at least
Here's a deck I've been thinking about using the new polymorph. Its basically a pacify deck until I get my tokens and my creatures out. Let me know what you think. http://www.mtgvault.com/ViewDeck.aspx?DeckID=78480