Hmmm, I guess you mean adjustable springs when you say "coilovers", right? Real coilovers cost $800 and waaay higher. If you're talking about Ground Control or Skunk2 adjustable springs, you're better off not getting them. They can have a very harsh ride, and will probably kill your stock struts with just their spring rates (highest out there for just a spring). You'd need something like Koni Yellows or maybe KYB AGXs to control them.
You're better off getting Tein S-Tech or C-One springs (both 1.4", as close as you can get to 1.5"). If you're willing to sacrifice a bit of height, you can also get H&R (1.3"), TRD (1.25"), or Eibach Pro Kit (1.2"F/ 1.1"R).