Well, just a tip from personal experience when it comes to modding cars. There is NO point in modding the car you own in order to make it faster than another car out there, because there will ALWAYS be a faster car out there no matter how much money you lay under your car's bonnet. If you're going to modify your car do it for you own enjoyment, not for the purpose of being faster than someone else. That's the only way you'll ever be happy.

XethW: http://www.startech.de
And if you buy the chip upgrade now you'll have to revert the ECU back to stock parameters before installing a supercharger. A Supercharger + an ECU that advances timing = predetonation. (is that the right terminology? I'm not sure.)
But anyway the chip will give you a 10% increase in torque at EVERY RPM value. Your powercurve will basically leap up about 20 pounds per square foot with the new ECU.