I'm hoping you can help me. I have a Samsung SP-R4232 42" flat screen TV. I've had it since 2004 or 2005. I've always had Comcast cable, so used a cable box. But I want to try going cold turkey from Comcast and save some money with my Roku. Here's my question -- how do I get regular (network) channels? Does this TV require a digital converter box? Do I need to buy an antenna?? Do I still need something connected through the cable cord? I'm clueless on this and want to get whatever I need before I cancel my Comcast.