Jasma is not an exhaust brand, it is a jdm rating of the exhaust.
---> http://www.jasma.org/
..basically if your exhaust has a Jasma rating, it's not too loud.
Here's my slap of reality...
It's your car and you enjoy however you wish, but not driving it to maintain its newness is bogus, IMHO. In a few years when you decide to sell it (and by the sounds of it, with all your restrictions and wife-imposed future children warnings it's a pattern I have seen on Prime over and over), the next owner will enjoy the newness of it and hopefully not give a frigg and drive the piss out of it --which was what the car was meant to do.
People who baby their cars usually drive hopped up Civics or 240's. People lucky enough to own truly exceptional cars buy them to drive them. Life is too short, it's just an object for your use.
You make very good points Oyagi...and they make sense. I do drive my car...just maybe not as much as I should. I take it out I think frequently but mostly short drives. As far as selling the car because of a kid...not going to happen unless we're on the verge of going broke or loosing the house. Wife knows that bit and she knows better than to challenge it. Just my bit of immaturity/irresponsible outlook I guess. I have a fairly successful business and my wife does quite well for herself too so not too worried about that...mods on the other hand are definitely not going to happen that often..lol.