I've driven a 5.7 with the Mopar exhaust, and it's mellow enough to come from the factory but loud enough at WOT and has a nice burble around town. I think I recall the Mopar rep I was driving with said Borla makes it.
thats good to know its by borla, as mopar charges an extra 1100 for their cat back. 1700 dollars is wacko.
they have a ram air style CAI though that is 970 bucks, but looks awesome. not on their web site yet though