I would not sign any papers until you check the car out thoroughly. You do not know if anything has happened during the transport. My car actually had a small ding w/paint chip (I'm still hyperventillating - spelling?)! Any way they are fixing my car that came in Monday morning. I still do not have my car, but they have not pressured me at all. My salesman has not asked for any money. I don't understand why they would want you to come in early. WAIT for the car to get there on their lot.
As for anyone who had established financing through PenFed don't rush getting your check too soon. They are very, very quick. I filed on a Thursday or Friday and had my check regular mail by the next week. I could not believe the quickness of this place. My salesman told me awhile back that if I wrote them a check to hold that would be good until I got them the money (mainly for a weekend if Financial Institute was not open). I would at least wait until the salesman called a said he had an invoice. This should give you plenty of time.