NO cars are perfect. And im sure theres a simple solution to the problems you are having.
I have a joep, and since i got my exhaust, its been a real PITA to tune right, to try to get some of the spike down.. so im in the same boat you are. But theres really not alot you can do to find a cheap solution.
Try the Boost Sciences, or a greddy Profec.
And if you have any other problems, get on here and post a mature question, instead of getting pissy about it, and i, or others will give you a mature answer.