Fujitsu Siemens - Amilo Pa3553
Acer Aspire 7720G
Last one to throw at you
hehe, i see you've been doing some shopping as well

out of those three, the Acer has the best graphics chip, but that doesn't mean it's necessarily the best buy. it all really depends on your priorities. would you rather have a physically larger screen, a smaller screen with higher resolution, or a smaller low-res screen with much more graphics capabilities (for more advanced 3D gaming)? that's basically the trade-off.
personally, i would recommend a smaller screen with better resolution. this will mean you have smaller pixels, which in turn means you don't need quite as much graphics power for the image to look good (but you do still need decent power, since you've got more pixels). if you can find a 15" WXGA+ screen (1440x900), i think that's the best compromise. i find having a higher resolution makes GC2 more enjoyable, since you can see more of your map at once.
i think if you can get a 2.0 GHz dual-core processor and 2 GB or RAM, you'll be set on those levels. you probably won't see much benefit in spending your money on a faster CPU or more memory (well, unless you're planning on some kind of crazy video editing on your laptop, but i'm guessing not

)
just avoid intel integrated graphics like the plague. nVidia tends to be the best. here's a rough breakdown of the best-to-worst graphics chips available for laptops that i can recommend at all for playing games:
nVidia 9xxx series
nVidia 88xx series
ATI HD 38xx and 35xx series, respectively
nVidia 86xx and 84xx series, respectively
ATI HD 34xx series, AMD RS690 (which is a rebranding of a scaled-down ATI core)
nVidia 7xxx series
now you might be able to enjoy gaming on an Intel GMA x3100 graphics chip... but i know i wouldn't.