The warehouse sellers have different part numbers than retail; so for example the 6150 is the same as 6100 in retail. Sometimes the warehouse one has something extra in the bundle; for example it was very common for Costco to bundle an HDMI cable in a blu-ray player box hence the different part number.
good info! seems like the 60" might be worth considering. Anybody know of any other high quality 60" LED tv deals this BF? Samsung/Sony/etc.