well for a descent price I think a set of neuspeed sport springs, matted with either kyb agx's or koni adj will suit ya just fine. springs are about $130 from alljdm.com. and the shocks are about $85-$120 ea.
the pillow mount isnt "needed" but its a good thing to have ... it gives the top part of the coilover a much more stable/solid mount (steel or aluminum Vs. rubber) it will give more precise handling and better road feel (the ride will be somewhat rougher)
and on some cars ( not hondas ) the pillow mounts allow camber adjustments
the ss's are the same as the ha's minus the helper spring, the ss's are a direct replacment for the ha's.. so, they are not that "cheap".. still 16 way adjustable shock w/ride height adjustable spring..