THe pro kit isnt gonna drop it as much as you think.I would get sportlines if you want a nice drop.But to get a nice ride they would require shocks/struts also.
Sportlines:
Drag springs cut 1 coil in the front:

__________________
621rwhp~504rwtq <----Old vortech T trim combo
2V 2.2 Kenne bell <---present combo
549rwhp~491rwtq SAE @15psi
560rwhp~490rwtq STD @15psi
My mods