I finished repairing a 09 GT/CS conv't with automatic trans and since it's stock it is well...slow to me. I didn't want to do a bunch of mods or tear into engine to get some more power. I am looking for 450rwhp which many say is the safe limit of a stock engine so thought a good power adder can get me there in 1 step. I am interested in the Department of Boost kit because it uses many factory gt500 parts but also like the Procharger because it is intercooled. What is popular and won't cost me an arm and leg?