@
msugi07 here is the thing to keep in mind. Spring rates don't really determine how nice a set-up rides, its the dampening. Good dampners are expensive which is why suspension is one of those areas where you get what you pay for. You could spend $4K on JRZ or Tein SRC with 10k/12k setups and probably ride smoother than a set of $1K BCs with 7k/8k springs.
Ask around Friday at the Dublin meet as there will be plenty of different suspension pieces, and many wil be willing to give you a ride to see for yourself. The stock dampners are very good, which is why a proper spring setup in this car is fantastic and really all thats needed if you just want a drop for the street and get a little performance increase.
Short list for your budget:
Springs:
Swift sport springs
RCE Yellows
Mann Engineering springs
Coilovers:
Tein Street Flex
ST
Bilstein PSS 14
Used RCE zero