You don't need them right away but why make yourself do double the work and spend more money. You will have to install the springs + camber bolts/arms and then get a alignment. Then install the struts/shocks later on and get a alignment.
Do it right the first time or get coilovers + camber bolts/arms. :thumb:
Plus search the forum, all your lowering questions can be answered on the Suspension section.