You'll want progressive springs rather than coil overs for a daily unless you like having fillings rattled out.....
I have a set of stock V6 STi springs and sway bars here that you can HAVE and try out.....if they'll fit your struts.
Sharing the love!!
I only fitted the lowered spring to bring it down after fitting the 17's. The sway bars, better rubber, alk, subframe lock and alignment made all the real difference in handling.
Springs and bars are here if you want them, try them first with the rest of your suspension mods before rushing out to buy something that may be hard to live with every day.
I had Tein coil overs in my series 4 rx-7, good fun for hooning around but they sucked on long drives (Perth- Margs) where I was left wishing for something a little softer / less harsh.
All comes down to personal choice.
PM me for my number if you want the STi springs & bars.