I heard Kenny Brown has some springs that really helped in both handling and launch of the new Cobra's. I'd check his site out
www.kennybrown.com . I think anybody will tell you that adding the proper bracing always helps in ride quailty and responsiveness (<-- is that a word, lol). I am not sure what kind of shocks are put on the Cobra's, but a good set could pobably help too.
I think that you will be happy w/ good springs, shocks, and bracing. Then you could decide if you want to go even further from there, but if you are looking for a good street set-up this maybe all you need.