Getting TV on a 27'' LCD

Currently I'm trying to get rid of my huge, non HD TV sitting on my desk. I've got a 27" LCD (http://www.newegg.com/Product/Product.aspx?Item=N82E16824005127) and I want to get my TV to come through that monitor.

I have Cable TV from Cox going through their converter into a Coaxial cable. But the LCD, as you can see, doesn't have anything except HDMI, VGA and DVI inputs. Is it possible in any way to get coaxial cable somehow into my LCD to get TV on it?

I'm also using it on my Powermac G4 as a monitor, so I thought about a TV converter but I can't seem to find a Mac compatible one, nor do I really even understand how those work...

Thanks for any help

yea the contrast might be really bad, if you have a hd cable box you can use hdmi to connect im pretty sure

oh i see what your saying.. was kinda confusing at first.. you need a tv tuner card...
i use this one and works out great...

http://www.newegg.com/Product/Prod [...] _-14129128

there are cheaper ones also.. shop google "tv tuner card"

EDIT: oh mac.. got it.. this should work

http://www.newegg.com/Product/Prod [...] _-15100040