If you dont do much highway driving, and you have an automatic, you probably dont want to be looking too high in the power range as you will seldom see the power cause of the automatic. Something to maybe looking into is a transmission cooler along with the other supporting mods of a bigger turbo. I have heard that right around the 330 or so HP range heat can become a problem in automatics. Other than that, goodl luck with your modding. Keep us updated.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX