Buying a new mattress is worse than buying a new car. I can't believe the high-pressure sales tactics used at some of the other mattress stores around town. With that said, I recommend Half Price Mattress. They used to be known as Big Red Mattress: http://www.yelp.com/biz/big-red-mattress-henderson . I'm not sure what the story is behind the name change, but it doesn't really matter to me.
I've been in need of a mattress for a long time and stopped at Half Price on whim. Christina, the sales person was very informative and very friendly. There was no pressure to make a decision. She gave us the facts and answered every question we had. She urged us to lay on EVERY bed in the shop to figure out which one would best suit our needs. At the end of our first visit, she urged us to shop around and do all the research we could. After a couple weeks of shopping around and researching online, we came back and got a Cal King Euro Top for $900 including delivery.
We purchased the bed on a Sunday and it was delivered by 10am the next day. The delivery guy, Bob, was really nice and got the mattress upstairs rather quickly and without damage to it or the house.
The only concern I had was the brand. It's a Kingdom Mattress Co. mattress. I could find little to nothing online about the manufacturer (they don't even have a website). But after looking all over town and talking to a friend in the mattress business in Houston, I decided to take the gamble. So far, I am very pleased with everything.
If you're looking for a quality mattress at a reasonable price and don't want the high-pressure sales team you'll find at other retailers, I urge you to check out Half Price Mattress.