what to buy?

Ok, so I've owned my base 2014 GT 6 speed, which I affectionally call the DudeStang, for almost 7 years. I recently had something fixed that was driving me crazy - some paint damage/scratches on the trunk lid and spoiler. The car isn't in perfect shape but it's in pretty good shape. It could...

so i got a 2000 3.8L v6 mustang and dont really know what to buy:shrug: ...should i replace the stock exhaust and get an off road x-pipe with magnaflow cat back or would the money be better spent adding something else? prolly lookin at spending around $1500 thanks guys!