I just purchased a 2011 EX-L w/ NAVI. Looking at the options my did not come with vs. the Touring Elite and I see some I would like to add. Has anyone tried to add any of the outlets like HDMI, RCA and the 115V? I see there is a place for them just wondering if it is way over priced to have the dealer install them or do I trust a car audio installer to do it?