Confused about graphics

I'm looking to buy a laptop, which will be used net surfing, email, desktop
app (e.g. MS Office) type tasks.

When travelling in our caravan I plan to use it a lot to play DVD movies
and also as a TV replacement - via a TV Tuner card and one of those digital
aerial things you can get nowadays.

Where I'm confused is whether I need to find the extra cash for a
dedicated graphics card (like the ATI X600) or if the basic much cheaper
integrated/shared memory graphics will be just fine for my needs.




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