Well jufging by your location, it probably doesn't snow a whole lot there. So you wouldn't neccessarily need coilovers unless you wanted that extra flexibilty.
For a TRUE coilover setup look to spend about $950 minimum. KONI has a nice set of adjustable & threaded struts & springs for about $970. I believe they use Eibach springs.
For springs, figure out how much you can drop your car. If you do alot of driving or have some rough roads, don't slam your car. You'll end up ripping it to pieces.
PHP Code:
FRONT REAR KIT#
Eibach
PRO-KIT 1.2 in 1.2 in 4011.140
SPORTLINE KIT 1.8 in 1.7 in 4.1140
H&R
OE Sport .75 .75 51851-55
Sport 1.5 1.5 51873
Race 2.2 2.0 51851-88
The Pro-Kits & sportlines run from about $180. The H&R springs run from about $172 & up.
Good luck........