I just bought a 2007 Forester with 89,000 miles on it. After driving it a few months, I notice that the brakes squeak the first couple of times when I use them. After I've used them a bit it stops. Two questions: (1) Is this normal or might I need new brakes? (2) If I do need new brakes, should I get new OEM brakes from a Subaru dealer (nearest is 100 miles away) or are aftermarket brakes okay?