After my 2011 sti was totalled, I ordered my 2013 sti last August. My parents were like, hey if you're starting over, why not get an "adult" car and call it a day? I went to my local Audi dealership (Don Rosen Imports- Conshohocken, PA - salesmen was a dick. I have emails to prove it). Test drove the S5 and loved it.
People kept telling me that once the warranty was out...I'd be screwed. Kind of scared me but I still wanted it. Eventually, I decided against it only because of the mileage that I'd put on it. Less than a year and I already have 15K on my sti.
In retrospect, if I was going to keep it relatively stock, I would buy the S4/S5 but since I wanted to do some modding, I opted for the sti again. Once I get married, I'll pick up an S3....it should be available by than haha