Honestly, having been through many brands of springs and struts in my previous car, coilovers are the only way to go. I still ended up with coilovers after it was all said and done. I wasted a lot of money and time. When I got my Camaro, I never even considered springs and went straight to coilovers.
If after you install springs and it's not the exact look and feel that you want, you are screwed. With coilovers you are pretty much guaranteed to get it exactly the way you want. Personally, the hassle is not worth it to me.