None...I have nothing in my current collection that I can't re-buy MISB with the insurence money.
A fire would only purge my collection of things I don't really want or need and make it better all at the same time.
I'd grab either the laptop or the our external hard drive....Pictures are worth more to us then any other possession.
Ok if I had a few seconds and the wife wasn't looking...MP Prime or MP Grimlock which ever is closest to the door.