Trust do a street set. You don't have to go to aftermarket springs. Of course if you want to rev past 8,700 it is a good idea to replace them with slightly heavier ones, and anything over 9,200 it is a really good idea to get a set of cams 264/10mm lift and matching springs.
Keep in mind if you go more lift than 9.2 you have to mill clearance in the had for the lobes.