If you consider a gaming laptop i can recommend the Toshiba Satego X200. It has a Nvidia Geforce 8700M GT gfx card (DX 10). Its more a desktop replacement not really something to put on your knees (its not light and getting hot
)
With the laptop screen the resolution is 1440 x 900. With my 21er Monitor i run SH3 in 2048 x 1536 very smooth. With all the new effects and scene mods im in heaven right now (Thanx again to the modders
).
Going to try SH4 for the gfx soon.