I did the same thing. A king size matress+box spring set is about $1300 for a reputable brand. I went with a $2000 set (Serta) and it's really a $2000 matress. Estimated lifespan is 20 years vs 10, so it's a good deal.

When we were shopping for it the saleman told us about $30,000 boutique matresses that are being ordered by the celebrity set. Hand assembled from top quality materials like the Savior. I can't see dropping that much on a bed, but I also can't see dropping 40K on a BMW when a Toyota will fit the bill for half that. Go figure.
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