Matt, I have been a member of Costco since it came here in the early 90's. It is one of my favorite stores. We bought a wide screen HDTV a few months ago ( after a year of "looking") from Costco and even though it was past the 30 day period, when they lowered the price of the TV $100 they did some creative computer work and credited our card for the reduction.
And your right about the return policy...they are rated one of the best retailers. Also a side note: They retain their employees and have a good pay package.
Gary