if you never plan on buying another vehicle I understand...just keep in mind most tuning software/hardware packages such as the one I use allow you to tune up to 4 vehicles with your initial purchase
Meaning ok you've got your SS now...maybe a year from now you get a vette you could tune that...then say you pick up a cheap 98 TA you could tune that...then a couple of years you pick up a truck with a blower you could tune that and all with no further outlay of cash.
Again its up to you, but theres no one in the state of NJ that I would recommend going to...I have faith in my tuning abilities & am always more then willing to show people how to tune. But there are only a handful of people I would let touch my own cars now let alone tune them and none of those guys are in Jersey.