Stock Springs
Steeda Sport Springs
About 1.5 in drop. Took the isolators out, got sick of the squeek and put new urathane (sp?) isolators in. 2nd pic is with new isolators. Running stock shocks. I'm saving up for billistens (sp?). Springs help corner but are rough over big bumps, but it's a good trade-off. I think any lower springs would be too harsh for me. Check out Ford C springs, maybe they are B springs not sure. There are some good options out there without the slammed look.
Good luck
If you don't want the slammed look, I would stay clear of the H&R SuperSports.
I scrape the bottom of my chin spoiler, sometimes my K-member and my exhuast over driveway entrances, speed bumps, and some of the enormous dips in San Diego streets. Soon I'll be removing my H&R SS and replacing them with Ford C Springs. Those were stock on the Bullitt that I had, and I had no issues with rubbing or scraping.