Please check the Paid Directory in my sig. Most sub categories are pr4. If you offer home services, you can try http://www.paiddirectory.com/HOME/Home_Services_/. It is 2nd inner category but pr4.
IMO - there are only 2 PR6 directories which fulfill your criteria and offer quality nowadays. kahuki.com & busybits.com Not far behind is allinfodir.com