For the sake of convenience we'd suggest getting a good monitor and adding a tuner card to your PC.
This will also add the ability to record TV straight on your PC, which is very handy. Buying a TV limits you to the tuner onboard, which may mean analog instead of superior digital.
Make sure to get a monitor that will accept computer inputs (VGA and DVI/HDMI) as well as analog ones like AV and S-Video, which will allow you to connect DVD players and the like if you wish. Check out our monitor reviews here.
Of course, buying a TV with an onboard tuner and adding a media centre will allow you to have the best of both worlds. If you go this route, try to get one with an HDMI/DVI input.
Be aware that many TVs with onboard digital tuners won't have a digital output, though.
Should you pay to get your new TV calibrated?: Getting your TV calibrated by a professional who visits your house can help improve the picture. Here's what you need to know.
What is TV color temperature, and why does it matter?: Color temperature is a TV control that most never touch, but it's the key to making your TV as accurate as possible.
Discuss: What's better for HDTV and computing: TV connected to a PC, or monitor and TV tuner card?
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