and how about springs, do need to buy new shocks as well or will the stock ones do well enough. I heard that coilovers gives a better handling than springs. Is that true?
coillovers are better (and much more expensive)
you can use aftermarket springs with your stock shocks..but they will only last an average of a year before you have to replace them (BUT, that is a year you get to save for them). almost any aftermarket spring you get will be stiffer, and your stock shocks aren't meant to take the extra abuse.