I just bought a beautiful 23" LG w2353v to use as an external monitor for my MacBook, and I was wondering if I could ditch my old 20" CRT TV and use the LG as a TV as well. It has a VGA, DVI-D and HDMI input. I originally thought that I could run a DVI or HDMI cable from my Comcast digital cable box, but it turns out my cable box only has a coax output. So I have two questions. The first is, would I be able to upgrade my cable box through Comcast to get one with a DVI or HDMI output, and if so would it cost much? The second question is, if it wouldn't be easy to get a new cable box from Comcast, is there another way I could hook up my existing cable box to my monitor for relatively cheap? Thanks in advance.