New Computer Considerations - Need some Advice

Have you gone to see them in the store in person? There is a big difference in the screen size. I like the Macbook portability, but if I'm doing anything with photos or design work or basically anything beyond reading and writing I like the extra space. We have both in the house.

The Macbook is great to haul around, the MBP is great for screen size. I don't know about the games you want to play, I don't play many games.

Also, the MBP has firewire. That's important to me because I have a miniDV camera.

I am pretty sure the MB will run those games just fine. It is running some pretty challenging 3D games without a problem so, you should be fine.

-mx

There's some good comparissons on the new macbook/pro's here
The macbook should be fine for games like Spore and Sim City 4 as the 9400 is a reasonably good GPU, light years ahead of the Intel ones. You can always add an external monitor if you need more screen space.
The Pro is very much aimed at the high end user so unless you really need all that power then stick with the macbook and take the RAM up to 4GB, just don't buy RAM from Apple as they are a rip off.