Hi thejude.
Welcome to our Mattress Forum! 
I am glad that you have found us and that our site is helping with your research and I hope that your research will pay off and you’ll find a very suitable and pleasing bed. If need be we will certainly do our best to assist you along the way.
We discontinued the provision of listings of potential retailers/manufactures in various geographic regions (unless they are a vetted member here of the site.), because of the difficulty in maintaining such lists in a retail landscape that is constantly changing, and most importantly the confusion it was creating with the consumer members who incorrectly assumed that these businesses had indeed gone through the strict qualification process and were approved as members of The Mattress Underground.
Having said that … I’m not sure if you’ve seen this already but post #6 here includes a list of the better options and possibilities I’m aware of in the Raleigh/Durham area, subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article ) and to making sure that any mattress you are considering meets the quality/value guidelines here. There are some good quality options available to you in the area to either test and become familiar or purchase different types of mattresses but where you end up buying from will depend on which of your options (either local or online) you are most comfortable with and are the best match for the parts of your personal value equation that are most important to you. I have not recently updated this list so you would need to check on each individual one.
Good luck in your testing and I’m looking forward to your feedback and any questions you may have along the way. I or one of our other experts of the site here will do our best to assist you.
Phoenix