I don't know if it's still available, but on my old '02 I wanted the same thing, quiet, but gave a better performance edge and tone. It had the HKS (I don't remember the model) carbon fiber one to begin with, and I hated it. I replaced it with the GReddy evolution muffler and had a local shop weld it up. It was SO much better! It was barely louder than stock, but left it with a very low tone that gave the perfect Subie bubble sound. I'm not sure if GReddy still makes the EVO or EVO2 mufflers, but if you can find one, even used, it'd be worth your while. On my '08, I opted for the SPT CBE. Same overall satisfaction. It looks mostly stock, except for the huge y-pipe from underneath. My local dealership actually had a deal on it because of the recession and what not. I picked up the entire CBE (keep in mind it's a dual muffler for '08) for just $350! They said they would have the special on them until the last one they had was sold. I'd check with your local dealership as I got mine in February, they may have something similar at your dealership too. Subaru list price for it is $900. It's also a full 3" from SPT, so you get the performance gain as well as a tamer sound. Both were still louder than stock, but completely manageable and you don't have to roll up the windows and drive timidly to hear the radio. Hope that helps you. Good luck and exhaust is a great first step to modifying your car.