Having owned several M cars and tuned sti's and wrx's, I'll chime in here. First I love fast subies. I've owned 6. So I have nothing but love. But there is nothing imaginable between an f80 m3 and an sti, where I would call the subie the winner. Ok, price and if I got a door ding, I wouldnt be as mad.
Now what is cool for the non subie people in the room...there is a camaraderie among turbo subie folks that's kinda cool. Love the subie wave. My wife makes fun of me everytime