Hi palermo22,
The better possibilities I’m aware of in your area are listed in post #2 here. These are possibilities because like all the lists on the forum you need to make sure that any retailer or manufacturer you are dealing with can provide you with the details of all the layers of any mattress you are looking at so you can know the quality of the mattress, identify any weak links, and make meaningful comparisons with other mattresses. The Santa Barbara list is in post #2 here but there are no factory direct manufacturers there except one that would not be one of my first choices.
As you mention … the first step is always to test mattresses locally because this is the “safest” choice because you can test the mattresses in person. If there are better online options available in terms of quality or value than any of your"finalists" locally … then I would talk with some of the better online retailers or manufacturers you are considering and if they have good knowledge and experience you can use your testing as a guideline to help them help you make the best choice. Again though … this depends on knowing the details of the layers in the local mattresses that are your “finalists”.
I would follow the steps in post #1 here and the information it links to (this is the most important post on the forum) because it’s probably a little too early early in the process to begin concentrating on any specific mattresses until you have read some of the basic information and done some testing to clearly identify your preferences. If latex is your preference then I would call each retailer or manufacturer before you visit them and make sure they have latex mattress on their floor that you want to test. I would also test some other types of mattress initially as well just to make sure that latex really is your preference because it’s very different from memory foam.
Hope this helps.
Phoenix