First, look up the Magnuson–Moss Warranty Act. Unless you buy an aftermarket CAI and that specifically leads to your cars headlights failing or whatever, you will have no warranty issues. Also, I am pretty sure they can't really tell if you tuned your car, they can see if certain adaptives have been reset which is a good indication, but you can justify that by saying you had your battery disconnected for some odd reason. Either way, they would have to look for it and unless you have a massive engine control problem, they wouldn't. Playing dumb works really well here, so does calling in every higher up at Chrysler if your dealer refuses warranty work.
Second, I have the Corsa Xtreme and they are not high pitched. It is a deep rumble at idle and it almost sounds like I have a cam. They are raspy, which can understandably be confused for high pitched, but it sounds good. It is quiet enough at idle, which means it does make the house vibrate a bit when it's in the garage, but it sounds mean when you get on it. MEAN. So go for the Corsa/Mopar, absolutely no drone. Unless they make an Xtreme version, then go for that. I might have drone around 80 MPH but with the radio up at a comfortable level I can't tell, and honestly I'm not even sure if I do have drone because I haven't really tried to listen for it since I drove it the first time. I think drone hides from this exhaust because it sounds so good. Also, I have a nearly ancient 6.1 SRT, so your mileage may vary, but I don't think it will by much.