My brother Joe, has a 2002 Altima SE that he bought new. He loves that car. It has headers, and a complete full exhuast system, underdrive pulleys (I think), computer chip, short shifter, cold air intake, I believe it has tokico struts and lowering springs, and big wide 18's. The car was quick stock, but now it's damn fast...but still very driveable.
He hasn't had it at the track, but he guesses its well into the 13's. One of his best friends owns a Mitsubishi EVO, and on every occasion the Altima has come out on top.
If you are thinking about getting one, it's a good choice. My brother does say the black paint is thin and sucks. So stay away from a black one. I had a black Nissan truck, and I can agree.