I'm in Georgetown County and I have the Time Warner bundle (internet, phone & cable), which has been satisfactory so far. But I think services may be different in Horry Co. but you can check their website, enter a zip code and see if it available.
http://www.timewarnercable.com/ Also, many of the real estate companies websites will offer relocation services or links on their websites assisting you with which services are available where.
Can anyone tell me how to get a hyperlink to work here? It never seems to format properly for me.