Theoretically, every suspension combo for a R33 is a "coilover"?
If you have windy roads, you want swaybars for handling. So you can afford to run slightly softer suspension. The best is going to be Bilsteins or Koni in the shock department, but at $1000 per end puts it outside your budget. If you can, maybe some KYB shocks with a Kings low spring and upgraded swaybars would seem appropriate (although that total combo is likely to be outside your budget as well).