Since you have both and if you REALLY want the STi, then I suggest you wait until they come out with a new engine. Now that Focus RS, Golf R, and possibly Civic Type R with same or more horsepower figures, it will force Subaru to increase the power figures on it I think. Keep your two cars for little longer if you can and trade both in for the new STi when it comes out
. I used to own 13' STi sedan and honestly I miss it despite having a shitty gas mileage. It just had more room and was comfortable for daily driving. Plus you have that turbo and awd.