If you're happy with the power, I'd leave the engine alone. I would maybe only consider changing the wheels, unless you like those. Everyone has personal preferences with wheels. Go with what YOU like. Congratulations on getting your CS Roush. You're going to really enjoy it come Spring.
Get rid of that roush tune and get a dyno tune.You will be very happy you did and new wheels with sticky tires Nitto Nt555r or Mt ET street s/s enjoy the new ride.