Things to consider before buying a bed.

We have a king.
king = 76x80 inches; California king = 72x84 inches
queen = 60x80 inches; full/double = 53x75 inches, and twin = 38x75

Don't buy unless 50% off list price...wait for a huge sale. Never pay full price. Look for misleading sales also. make sure discount is based on actual price of sale, not some inflated price.
Don't be afraid to haggle over the price.
Asking if the price is better on their website can sometimes prompt salesmen to give you a better deal or thrown in extras if you buy in the store.
Ask about delivery fees, trial periods, return policy, restocking fees, pick up fees.

Insist on a NO-SUBSTITUTE clause in the sales agreement in case the bed we order is out stock.

Ask about a fee for hauling away the old matress or is it included or not available.

Ask about return policy (periods and fees)
Expect to pay a fee for returning the mattress. As little as $60 but as much as 25% of the cost
Inspect before sign for the delivery.. broken slats, stains, tears, etc. Demand replacement.

Look for comfort guarantee. Some may be 2 weeks other a few months. Is it good for exchange or money back? Sears does charge for returns or exchanges within 90 days.

Don't count on warranties. Warranties are usually 10 years, but are not for

comfort or normal wear. They are for defects in materials or workmanship.
Ask if the warrantee is full replacement or pro-rated by the year.

More willing to bargain: Sleepy's and 1-800-Mattress, and some furniture stores

Start out with the least expensive bed from a few top brands, and work your way up in cost. Hint: Stores keep the priciest models up front.

Manufacturers usually modify innerspring mattresses for different sellers, changing the color, padding, quilting pattern, and so forth. Panelists who took beds home for a month-long trial rarely changed the
opinion they formed after the first night. We found that companies frequently pair the same foundation with mattresses in different price ranges. You can save by buying a higher-priced mattress and a lower-priced foundation.

Don't remove the tag from the mattress. It is not clear if manufacturers will honor the warrantee if it is not attached to the bed.

Inner Spring mattress
These are the least expensive. Try not to buy the cheapest one, but beyond that they should be good. 73% of the people who bought them are highly satisfied compared to 83 to 85% buyers of memory-foam or adjustable-air variety.

Ticking
This is the outermost layer of the bed. The pattern more than the material determines how it feels. A large quilt pattern provides a deep, cushioned sensation. A smaller pattern tends to feel firmer.

Coils
heavier gauge coils provide a stiffer suspension. Lighter gauge feel springier. All types (hourglass, continuous, individual pocketed, etc are all good.

Box spring
Consider buying a cheaper one if buying an extra-thick mattress consider a thinner box spring. Look for the same on on a cheaper model of bed to save money.


Topper
If you pick the right mattress you won't need to add one.

Brands
Sealy #1 sold... known for Posturepedic/back friendly. They use orthopedic doctors as consultants in the design of the beds and come with a certification from thh Orthopedic Advisory Board. Customers find it affordable as well. Posturepedics are designed for orthepedic support. It relieves pressure from
bodies through its push-back system which distributes weight away from our heavier body parts. They have firmer edges by design. They also offer the Comfort series that have the same benefits but for a cheaper price. The comfort series uses memory foam to relieve pressure and improve posture.

Simmons #2 sold...known for bowling ball to show its motion separation. fair to good durability, and good value for money, luxurious feel, good comfort. Used. Provides better support and comfort to the body than the other brands, and minimizes movement felt from partner. Middle of mattress begins to sink after some years of use.by Westin hotel chain and can be purchased for $1750 for King. Their best selling line if the Beauty Rest mattress that features comfort and undisturbed sleep even with a partner and is designed to achieve balance and proper posture by distributing your weight while you sleep. They also offer the comforpedic mattress.

Serta #3 sold... seems to have cheaper options as well. It is rated as 3/5 where the other two where 4/5. they seem to be lacking in comfort and durability says one review. Premature sagging after just one year so best for kids though (have a kids line). Used by Hilton. Shyreton Pillow Top Mattress is high quality at an affordable price and is very popular with customers. It is soft yet firm. Next in line if the Serta Perfect Sleep
mattress has two layers of comfort foam, and comfort zones to help blood circulation.

My least favorite would be Serta. I think Sealy would be best due to posturedic certification, and durability. However, the Simmons sounds good for the pocketed coils that make feeling of the partners movements minimal and comfort.

Everything except the last paragraph is copied or paraphrased from the following links:

http://www.bestmattressreviewer.com/sealy-mattress.html
http://www.consumerreports.org/cro/mattresses/buying-guide.htm