For a daily driver with virtually no planned track time, forget the adjustable shocks. 98% of your perceived ride quality is going to come from your decision on the shocks and struts. Don't cut corners here. Spend a little extra money now and I GUARANTEE you will not regret it. My damper of choice is Bilstein. You simply can not find a better off the shelf shock or strut for a performance daily driving.
As far as springs, you have a lot of options. If you're looking only to drop the stance of the car, then the decision becomes pretty easy. Just start searching the forums for pictures of lowered cars and use the springs that'll give you the look you want.
But human nature always makes us want the springs that give us the perfect drop
and have the perfect ratio of performance to street manners. Thanks for my cake, where are the forks?
So what spring rate should we strive for? For a performance daily driver, I like the 550#-600# range up front and 250#-275# range in the back. Unfortunately, this slips right in between the popular (and cheap) Ford B and C springs. Don't get me wrong, the FMS springs are good, and if they offer the drop you want, then by all means go for them.
But since I'm making the recomendation, I suggest H&R Sport springs, based on the spring rates. The drop is about 1.5" with just a tad more than that in the front. They maintain decent street manners while offering a noticeable increase in street performance.
Now as far as pricing, the best I've seen on Bilstein struts has been from
www.oemfordparts.com. I got my 2000 Cobra R struts (same as the 03 Cobra) from them for $275 for the pair. Hopefully that price hasn't gone up too much.
I then picked up my Bilstein sport shocks from
www.shox.com for around $170 for the pair.
For the springs,
www.maximummotorsports has them for somewhere around $220.
Yes, you can get cheaper shocks and struts... at the expense of ride quality, performance, and longevity. Yes, you can run aftermarket springs with the stock dampers... at the expense of ride quality, performance, and longevity (to the stock dampers).
I'll say it again: You will NOT regret spending a little extra money in this department.