Recording TV

[Barrister73]

I would, at some point, like to start saving TV programs on my computer. A quick search on the web didn't really answer all of my questions.

My current setup is this;
Antenna for local stations
a few fuzzy channels that come through cable

My home internet is through a cable modem.

Since the world, including the lag-behind USA, is going digital, I want a setup that can record digital "antenna" stations without the need for an additional converter box. I'm sure I'll get cable TV in the future, so I would like for it to be able to record cable as well as antenna TV without having to switch wires around.

I saw this on Newegg, but I don't know if it is what I need/want.
http://www.newegg.com/Product/Produc...82E16815116015

So...
What video card do I need? Do I need it to be internal, or is there a good USB/Firewire one?
What other hardware do I need? (I assume; new hard drive, cable wires, antenna)
How do I hook up cable to the computer when I already am running a cable modem? Do I just need a simple "Y" splitter to run both to the same wall jack?

Thanks for the input,
MRR