I've always liked Best Buy; have bought a lot of things from them over the years.
A 3 or 4 years ago their return policy was getting to be totally ridiculous (only 7 days in some stores) but then they got new management and everything has improved for the better; better return policy, and more friendlier, courteous sales people.
But... I no longer buy from them; in fact I no longer buy from any local electronic store other then the occasional jaunt to Radio Shack for some connectors or cables.
The only exception is buying most of my computer parts from Directron
http://store.yahoo.com/directron/directronlist.htmlwhich is only a few blocks down the street from me. Directron has over 10,000 computer parts in stock at all times. They have everything and sell it all at wholesale (but, I do have to pay taxes as they are local (Houston, Texas).
For the last two years I have done much of my electronic and appliance buying on line; much better selection, much better prices not to mention no taxes. The total savings on line is significant indeed.
I have also been very impressed with many of the on-line merchants such as Amazon, B&H Photo, Adorama Photography, and many, many others. The return policies are very good; they stand behind the product, and have always provided me with very fast and extremely courteous service. I'm totally sold with on-line buying from large, reputable stores such as these.