If you want to keep it as quiet as standard but add (A LOT) more power and torque across the rev range, then go for a Stage 1 only; it's also by far the biggest gain in power you will see for your money, esp. on K04 like you have. You'll see a healthy 200bhp at 3k RPM with ~300lb/ft of torque... then probably around 280bhp+
I'd grab a custom map from rTech if I were you.
Spend the rest of the cash on better brakes.
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R32 or Porsche 4 pots....