i want to first apologize for every one else. although this topic has been discussed to death, you are new here and now aware of this. all questions are welcome here. for future reference, its much faster to just click the search button in the upper right and type in what you want to see. its much faster than waiting for replies..
member: lets be more respectful guys
just to throw in my 2 cents: i understand where you are comming from. the blow off valve does sound awesome, but its not really necessary and has been known to take power AWAY from wrx's on stock boost.
i suggest you do an uppipe and MBC first. they are both cheap and will up your boost.. not to mention your turbo will spool louder so that will compliment the BOV nicely.
good luck and welcome to the club