If you plan to lower the car 1.3-1.5 go with KYB AGX. They run about 350 for the set.
If you plan to go 1.8 or lower, go with Koni Sport Yellow. Those run about 450-500.
If you want to do it right, spend a little extra and do a full coilover setup such as Tein. Their BASIC system runs at 600-900 and performance SS system at around 800-1000.