Hi BaggerX,
The best way to get past the “overwhelm” is to first read post #1 here and the information it links to. This will help you eliminate most of the worst choices and save you many wasted hours and the confusion that is part of dealing with chain stores and major brands which won’t provide you with any of the information you need to make good choices.
All of these are poor value and unfortunately you won’t be able to find any real information about them which will give you a meaningful way to compare them with other mattresses (unless you are willing to spend many days and weeks tracking down information that isn’t generally available). “Presidents day sales” and all the other “so called” major sales are just marketing gimmicks. Nobody ever pays the price the discounts are calculated on and even the best sale prices … plus a further “negotiated” discount (so you feel like you got a good deal when you didn’t) will typically end up as a poor value purchase … and you still won’t have any idea about the real quality of what you just purchased.
Two of these are in the San Antonio list in post #2 here.
Of the ones you mentioned that aren’t on the list …
http://www.mattresssanantoniotx.com/ I would focus on the Kingdom mattresses here which are a local manufacturer based in Houston. they also carry Sleepinc which is a sister company to Corsicana and is a licensee for Therapedic, Spring Air, and Englander which may also have some better value mattresses.
http://www.experiencethesleep.com/ I would focus here on the Restonic and the Bartlett & Moore (made by B&M).
No matter where you buy a mattress … the most important part is to never spend any time with a mattress where you can’t find out the quality of every layer in the mattress so you can make meaningful comparisons and identify any potential weak links in the mattress. This includes the actual density of any memory foam or polyfoam and the type and blend of any latex. The manufacturers or retailers that can and will provide this to you are the ones where I would put my focus.
Phoenix