I put straight pipes in quite awhile ago and haven't regretted it. You can't even hear it when you're cruising. It's also a great way to tell if one of the kids didn't close their door all the way, since it's normally so quiet when everything is closed up.

One of the mufflers had a hole in it anyway, so I had to do something so fumes would quit coming in. The only thing I changed later was to make the exhaust exit out the side, not at all because of noise (didn't change), but because fumes would still come in if just the right combination of windows were open. Now I'm as happy as I could be with it.

-Rog