Hi John,
Not sure if these are included in the S spec but for the SE I also added automatic folding wing mirrors, as the standard is still manual switching and is a real pain to remember.
I also added the rear air bags but depends how often you have people in the back! The hill hold is a must and imo the cruise control is well worth the money as is the sat nav and AMI. Hope you also have the full light pack as excellent on dark nights, wish I had also gone for the comfort pack for the same reasons as you!!
Sorry cant help with the roof bars but it does sound like you will get a lot of car for your money.
Roger