Not lowering a car is like not putting braces on your kids teeth when they have big gaps.
If you're going to do it, do it right. Go with coilovers. Yes just adding springs will give you the better look and a slight increase in performance, but adding coilovers will be a night and day difference in ride quality and handling.
I spend just under $4k out the door for Cross coilovers, installation, alignment, corner balance, and tax. Well worth it in my opinion.
-David