I just got two Light Speed sleeping pads from Costco (I saw it the first time at the location in Ontario, CA; bought these in Fontana) for $35 each. Great deal, I will see how they perform this weekend. Definitely a car camping pad, not suitable for backpacking as the weight comes in at over three pounds. But they self inflate to 3.5 inches and even my wife, who is not shy about her disdain for camping, admitted that they feel good. I've been holding out on a good car camping pad until I found a steal and I think/hope it was worth the wait.
So this is as much a heads up as a review because once its gone at Costco, its gone.