This was a solid episode. First things first the play-rape scene with Tig's daughter was hilarious. I laughed aloud when Jax said "wow." right before the commercial break. I'm glad Jax & Tara got married. The ceremony was pretty cute. It's fitting that they're wearing Gemma & John's rings even if it is cheesy and cliche. I can't wait to see Nero take advantage of SoA - Jax & Gemma in particular... too good to be true for sure.
So the ransacking of Gemma's house for the safe was probably the nomads. From other reviews, in case if nobody else could see it (who could? I don't have a theater-sized screen, FX) the documents that guy was looking at was Thomas' (Jax's brother) birth certificate (supposedly).
As an aside... I HATE Jax's hair. It looks pretty ghetto. Why does he have to change it every season? I guess maybe this is better than his worst when his hair was way too long...