I'm with Storm. Unless you are talking about swapping parts from an SE-R, NX2K, or other platforms (Maxima rear brakes, P10 seats, GTiR drivetrain, VE, etc..etc..yada...yada...) there is no question on which is the Thee Best Sentra.
Stock, the 2-door SE-R by a veritable landslide. Uh...duh.