Op there will be a lot of 3800 guys who say things like for what it is. Don't pay that any attention as you have a great car that performs good out the box...

As mentioned before you'll want to invest in a couple things for longevity of the car.

Trans cooler in a standalone config

Trans filter replacement with new fluid.

Shift kit as well.

Go for a tune. A quality one.

Tune your car up.. Msd plugs are among the best and a set of tr6ix NGK plugs.