Single exit is your best bet. I have heard the Borla and it sounds deep and not raspy. Most well put together Focus exhausts don't get the cheapo sound that the Civics tend to have(due in part to some of their owner's having cheap tastes).
2003 Ford Focus ZX3("FUBARCUS" was "Brokus") - old and still busted
2007 Subaru Impreza 2.5i - current DD