I'm in the market to buy another Challenger( if it doesn't get stolen again). It's been awhile since I owned one. Between a corvette and challenger. Challenger wins so far. I'd like to know a few things in advance prior to buying one. It will be an Rt. Do I also at time of purchase have Mopar performance stuff installed like exhaust and cold air intake or wait and buy aftermarket? What would y'all do differently when getting yours all over again? Thanks.