It really depends on your future goals for the car and how hard you drive it consistantly. Are you planning on continuing to up the hp and build the car even more?, or do you plan on keeping it the way it is for a while?
If you plan on keeping it the way its set up now( motor and turbo wise)id just rebuild it or replace it from suby. But if you plan on taking it even further, like you seem to do with all of your cars lol, id go for the Dog box.