Pure Hellspawn

I need a fast, cheap laptop that meets the following circumstances:

2.0 GhZ (Pentium IV or better).
1 GB RAM
3D Graphics Card (32 bit supported-OpenGL Hardware)
DirectX Compatability- Latest Version
16 bit Sound Card or Better
16x or faster CD-ROM Drive
20 GB or more Hard Disk Space
Windows XP Home Edition
Under $2000

Any recommendations?

I need it for at least four years, and I want it to run games such as Quake IV an DOOM III.