The fact you have an uprated fuel pump helps your options a lot.

A re-map is the way home, to give you the extra BHP / Torque you are after. If you look in the "Thomson Local" section you will see all of the detail for Polar Performance (Scott T / Siver Surfer). He is the man to talk to for sure.

What ever you do though, don't get caught up in a battle for BHP only! The best advice I could give is try to keep them somewhere near equal. Mine is currently 348bhp & 345mn Torque. This gives me PLENTY of beans! All of this is achieved without induction and the like plus the fact I am using stock Subaru Parts. Including a sportcat.