Hi dri-bee.
Welcome to our Mattress Forum! 
It seems that you have a plan sketched out … provided that whatever business you’re considering, you confirm that any retailer or manufacturer that you wish to visit is completely transparent (see this article) and also make sure that any mattress that you are considering meets the Post #13 quality/value guidelines here.
We have decided to discontinue the provision of listings of potential retailers in various geographic regions (unless they are already approved site members), 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. Such an assumption is unfair to both the consumers seeking assistance, as well as the very businesses and manufacturers who meet the criteria to become Trusted Members of The Mattress Underground.
You can perform a forum search and you can type in the key term any city or area you would be closer to and consider driving such as Pittsburgh or any other area and see what other businesses have been discussed in that region which may be helpful to you.
If you call some of the outlets on the previous listings and let them know in general what you are looking for … they will tell you if they have anything suitable for you to try before you take the time to visit them. I would tend to keep your options open rather than deciding ahead of time on the type of mattress that you may prefer and describe what you are looking for in terms of preferences instead of a specific type of mattress design (such as a “pillow top” innerspring hybrid). This way you may find that a mattress that you otherwise may not have considered is the one that works best for you and meets all your needs and preferences. For example, a latex over innerspring combination where you are sleeping on the latex may work just as well as an all latex… or at least may be worth considering. Every “category” of mattresses has a wide range of different properties and “feels” available and there is a wide range of different quality in every type of material.
If you decide to look online, you may wish to use the experience and expertise of the members listed in post #21 here who are all very experienced and knowledgeable and specialize in providing the type of help and guidance on the phone that can help you make good choices. There are a wide range of latex and hybrid options included in the choices there and I believe that all of them compete well with the best in the industry in terms of their quality, value, service, and transparency.
I’m not sure what you’ve read since you found the site but just in case you haven’t read it yet … the first place to start your research is the mattress shopping tutorial here (there is a condensed version of it at the end of that post) which includes all the basic information, steps, and guidelines that can help you make the best possible choice … and perhaps more importantly know how and why to avoid the worst ones. Two of the most important links in the tutorial that I would especially make sure you’ve read are post #2 here which has more about the different ways to choose a suitable mattress (either locally or online) that is the best “match” for you in terms of “comfort”, firmness, and PPP that can help you assess and minimize the risks of making a choice that doesn’t turn out as well as you hoped for and post #13 here which has more about the most important parts of the “value” of a mattress purchase which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well he will sleep), durability (how long he will sleep well), and the overall value of a mattress compared to your other finalists based on all the parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase if your choice doesn’t turn out as well as you hoped for).
When assessing any product, also be sure that you find out information listed here so you can compare the quality of the materials and components to the durability guidelines here to make sure there are no lower quality materials or weak links in a mattress that would be a cause for concern relative to the durability and useful life of a mattress before making any purchase.
If you have any questions about specifications or certain products you discover, feel free to post back on the forum and I’ll do my best to be assistive.
Phoenix