I agree with Haraka.
Don't bother with DELL they use cheap components and that article shows it all
get a Toshiba they're excellent machines, Samsung notebook is fairly new but they have excellent LCD display.
HP is not too bad I recently bought a HP machine and been quite happy with it. If you have a bit of money get a Fujitsu machine.
You might want to get something that's ready for Windows Vista, so dual core processor, 1gb ram, at least 80gb hard drive, independent graphics card instead of shared. I heard Vista is very high demanding operating system.
If you want to play games, an independent graphics card is a MUST. Have a look at the Toshiba Tecra A6 or A7.
Feel free to ask more questions, I sell computers for a living so I should be able to answer them