I will add my two cents here.
NASA: I lifted there a few times as a teenager and in the Jounior divisions. Never really much competiton there, but I think they have good size meets in the midwest. Equipment was ok, they use squat stands, no monolift at the ones I went to. The people in their organization tend to mock people in other ones. The same guy BTB refernces above wanted to mock my squats, and how that they wouldnt pass in NASA. Guess he didnt know that I was the American Record holder in NASA for 3 years in the squat haha! They are a drug tested organization, although between Honeycutt and myself we broke 4 american records and were never tested. This is my beef with drug testing feds, and part of the reason why I dont lift in them anymore unless its a big time meet.
SPF: Great equipment, by far the best I have ever used at a meet. People are friendly, and supportive. They have a bad name for some questionable calls on squat depth, but I have seen them redlight many close squats. This is a non drug tested organization, but they offer raw, single, and mulitply at pretty much all their meets. I saw some great raw lifting at the last one I did in Myrtle Beach. For my money the SPF is the way to go, but each person is different. I am doing another SPF meet next month, that will be bench only.