I have recently looked into upgrading my stock speakers in my 06 RT as well as add an amp and a couple of subs. On first trip to Best Buy to gain some knowledge I was told I needed a Kicker Sum8 before I should even think of adding anything on because I was running off a stock deck. I questioned buying a aftermarket deck to avoid this but was told Id need a data stream cable for that as well which would be $200. Any help or suggestions here?? I don't want to buy this thing if its a mere grab, or its for someone who wants a high end system, I just want a little more kick. Thanks!