Just trying to get an idea of which aftermarket exhaust will give me the sound I'm after.

Exhaust must have a muffler, and I would plan on using the Solo high-flow cat.

At idle, I want to be either the same as stock, or just a bit louder.
When driving, I want the exhaust/engine to sound smooth, not ricer honda-ish with a $20 pepboys muffler. When the rpm's increase, the loudness increases of course, but I want a really smooth sounding exhaust, maybe Porsche like or something?

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2007 Aggressive GXP "Natsumi"
GM Stage II Tune, GMPP Intake, SSR Type-C RS Wheels.