I already ordered the seat post and headset locks, along with the skewers . I was worried about someone removing the saddle bolts and walking off with it

I think I'm going with security torx bolt the rack and saddle, pinhead on the rest. I have a Onguard u lock and cable I use at work, buying a smaller stronger u lock to carry with me, along with another cable. So if they want it they still have to cut off a thick cable and saw off my u lock.

I am mostly worried about opportunistic thieves, I don't leave my bike in the ghetto or in high traffic areas where a professional thief might lurk.