to me it sounds like u should go with springs with the info u provided. if u just want a small drop while reducing body roll and all that jazz (no pun intended

) just go with some reputable springs. i have alot of experience with tein and eibach and either one i would suggest if u want a slightly lower stance than stock. just understand that they are not geared towards track/race use and get shocks/struts to match the springs because over time (some longer than others) the stock shocks will loose pressure and become bouncy and counter productive. it also makes the install much easier than having to rip apart the stock setup and u get to keep that stock setup if u ever want to switch it back to stock. if u have the extra money go with full coils from a good company. most of the time they will be harsher than springs but u have the luxury of dialing in ur stiffness and ride height.
for me its a 100% or nothing so i would go with full coils such as the bc coils because after u get a shock/spring combo going u will be pretty close (depending on brand) to the price of full coils.
i understand your hesitation about going with bc coils because my bro and i went through the same discussion but to our suprise it worked out great. also the bc coils have a warranty program with their shocks, so if u blow one its like 95 bucks or something to get it replaced/repaired. so really its a win win situation. i hope this helps u out some
ok enough gabbin from me. back to work.