I don't know if you guys have seen this before but John Cobb has created some beta race maps which provide a pretty significant gain in performance over a stage 2 map. These upgrade a basic stage 2 map, with the only requirement is that you have a stg 2 setup and a walbro fuel pump.

BETA RACE maps. 2.5L STG and 100+OCT - NASIOC


I just finished installing my fuel pump today and dropped one of these on there. Very noticable difference! Much more aggressive than before! I didnt realize until now, but just goes to show how crappy that off the shelf map was.

IWSTI has a thread about it too.
New Staged Maps by John @ Cobb! - IWSTI.com: Subaru WRX STI Forums