sportlines are pretty low compared to pro-kits. if u want a drop thats inbetween the 2, try H&R sports.

prokit 1.3/1.5
h&r sport 1.5/1.75
sportline 1.7/1.8 (i believe, not positive)

i was riding on H&R sports for about a year with no problems on my stock shocks. i'm now on kyb agx and the ride's great.