Koni makes great shocks. I've got their 3012 aluminum body double adjustable shocks in the FFR and they're amazing.

Eibach springs are fine.


As far as coilovers go, you gain ride height adjustability. That's why ricers love them and think it's great for performance. I consider it (to a large degree) to be a red herring. The down side to that is that by changing the ride height, the car operates in a different part of it's wheel travel and you can easily get into areas where you have unfavorable camber changes and things like that. Cars are designed to have good suspension behavior at the oem ride height.

The UPSIDE, if you're willing to spend the money on the alignment is that you can have the car corner weighted. Small (VERY small) changes in ride height can shift the weight around signifigantly between the wheels. The idea is that you shift the weight around so that the cross weights (LF+RR) and (RF+LR) are the same. Typically it's done with ballast in the driver seat that is roughly equivilent to the driver. I'll spare you the math involved, but the end result is a car that is very well balanced.


Something to consider before making any changes is how it will affect what class you run in. Right now, I know you only run with sunriders. Their class system is very simple. If you start running with other groups, you need to be aware that springs or coilovers could bump you to signifigantly more competative classes.