Nice car but with high miles a supercharger will show you what shape the motor really is in fast.
You need to also think of how long your going to keep the car after you boost it and if you need a motor and trans rebuild can turn into big money fast and you will not get your money back if you sell it
Maybe Look for a used procharger and save some money or I would get a c6 grand sport then you get take the top off still go drive a c6 I bet you will fall in love remember your the one that said it looks dated power will not fix the looks
Good luck with what ever you do