I'm glad it was FINALLY spelled out. There are soooo many threads on what is or is not stage 2. I wish it was seriously just broken down to "Tune/Downpipe" and boom.
To the OP, like people are saying you need to find a tuner who you like. Shop around and see what they say/have done. Check the reviews on your local Subie forum as well. Here in Vegas we've got a guy we send everyone to and he's great. Good luck, lovin my tune/dp!!! Totally new vehicle