Definetly an exhaust (many opinions on which one to get listed here on Dodgetalk), I like Flowmaster's American Thunder system. If you want that exhaust to sound even better, and get a little more punch out of it, add the intake too. My only suggestion on the intake is don't go cheap. I had a cheap one off ebay on my last Ram, and it was ok, but the K&N FIPK2 system was well worth the extra couple bucks. As far as the chip... most companies list dyno results to back there product, so compare them, and the prices to pick the one for you.
So from all of us who still support America, and buy American... Welcome, and happy upgrading. :gr_patrio