The LM5800 and LM4600 are basically the same tv. The LM5800 just uses a slightly different housing. In the US, most of the big box retailers/online warehouses only had the 5800 series available for couple of months in mid 2012, if they had them at all. They suddenly disappeared and then the LM4600's showed up in September/October. I've checked the parts lists and the LM6200, LM5800, LM4600, and the G2 all use the exact same model LCD panel, at least in the 47" and 55" sizes. They also all share the same power supply. Other than the G2, they also use the same mediatek processor that LG used in just about everything from the LM6700 on down. If anyone wants more info on the LM5800, they could probably just read the threads on the LM4600. Not sure why most of the US switched to the LM4600 series. Perhaps model number confusion as the LS5700 was a smart TV, while the LM5800 was not?