now this might sound stupid but within a week i have completely swapped many things on the car per info on this site (i purchased because it had a GREAT maintenance history and lowest miles i could find for what i wanted to spend 100k)
Second, fill in your profile.
Fifth, you paid $100k for your car?!?! (Just kidding.)
Tenth, Maintenance is the biggest thing on an 11 year old car. Since you're at the 100k mile mark, definitely check if the timing belt and other 100k service was done. If not, get ready for it, as it's coming up. No harm in doing it a little early.
Seventh, if you have a TBE, you should be able to swap out the ABE (axle-back/muffler) if all you're looking for is a little bit of peace and quiet. Just check fitment and flange size. And please don't ask that on here. If you don't know what exhaust you have now, we can't help you answer that question.
(Since we don't know where you live, it's worth a shot to plug)