Dell do great high-end/mid-range gaming laptops imo, but they might just be out of your range, depending on how you configure your model.
They do have models that can have a 7,200rpm HDD and DDR2 RAM, which is real nice, especially for gaming.
Windows XP Pro 17" LCD Monitor (1280 x 1024)
nForce3 250 Chipset Athlon 64 2800+ w/ C'n'Q
1 x 512MB DDR400 CL3 SDRAM 40GB IDE 7,200rpm HDD (8MB Cache)
nVidia GeForce MX420 64MB PCI On-Board Audio