I don't believe that a FMIC would be a wise decision for a first mod, whether it be Greddy or otherwise. Without an upgraded turbo (with requisite fuel system upgrades), it would do nothing more than increase turbo lag. Also, if you increse the boost above 15.5 psi, you will do nothing except heat the air, which will cause performance losses. I would suggest starting with a catless up-pipe and a turboback exhaust. Also, if you want a staged upgrade without sending in your ECU, you could always purchase TurboXS's UTEC, which allows you to retain your factory ECU.
While I agree with WRX-Rated on the Canadian government (socialized medicine . . . ack), I despise Avril Lavigne. She wants to be a punk rocker but she is admittedly ignorant of the Sex Pistols.
But I digress. Good luck on beating your friend in the future.