Which PC?

I have made my decision... I think. I am buying a notebook. Right now I feel this is the right choice. After it arrives there will be investment in a router and a wireless access point, and then there will be wireless broadband for all... including my neighbours, who will probably end up freeloading off me. One thing is for sure though, when Half Life 2 arrives I KNOW I am going to regret this.

Anyways. The next choice is which notebook to buy. I'll probably buy through Tiny.com as they have, by far and away, the best prices. I'm just in the process of checking that they have a 'no quibbles' money back guarantee. Just in case I'm not happy with the product.

These are the options:

Option 1: AMD chipset, gig of RAM, 64 meg Radeon

Option 2: AMD chipset, half-gig of RAM, 32 meg integrated graphics, DVD-rewriter

Option 3: Centrino chipset, half-gig of ram, 64 meg integrated graphics

I'm tending toward Option 1 for the extra RAM and the Radeon graphics card. I'm not really sure how much I would use a DVD rewriter so giving up all the extra grunt for one doesn't gel to well with me. Is the centrino chipset really worth sacrificing the RAM (again) and giving up the Radeon card for what is possibly a no-brander?

Let me know your thoughts on these. I'm looking for guidance.