The value of money isn't linear, you need to check what prices are over there - basically you want to have graphics with dedicated memory, even if the rest is entry level that will ensure that LFS is at least playable.
If you can afford it get a Sony - they come with loads of crap installed, but the hardware is good quality. If on a budget, check out Samsungs. Try to steer clear of HPs and Acers, I don't personally like Toshibas but some people do.
If you can afford it get a dual-core processor, graphics with 128Mb or more dedicated memory and 1Gb or more of Ram. Unfortunately laptops are pricey, so if you can live with a full size PC you can get more machine for your money
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