I've got a Roush 427R with the polished option. If you are concerned about keeping the motor looking nice and clean, I would say the polished surfaces are actually easier because they do not absorb gas and
oil stains like the regular unpolished surfaces. However, I am with Entdoc. I got the polished option thrown in for free because my dealer had one sitting in his shop that another customer had backed out on and he wanted to move it. I wouldn't have paid for it. I would have spent the extra money on upgraded brakes or an accusump systtem or some other performance enhancment. But that's just me.