If performance is not really a big consideration (read: any at all), then just stick with stock. They are stainless, very quiet and will last forever. The last thing needed is another obnoxious rice fart-can on a car with no real preformance upgrades... IMHO.

And unless you do a cat-back system at least, you're really not going to see/gain that much power out of freeing up the exhaust via just a muffler.

CAIs help some and do sound a little raspier. It makes sense that if the intake is modified that the exhaust should be modified. But now we're starting to get into the edge of attempting to increase performance with these 2 things, etc.

I'm rambling...