budget ...lets say 3500USD
Things to consider: Graphics card/performance, battery life, size/weight, screen rez, price, service.

the four i like:

Hypersonic cx6
http://secure.hypersonic-pc.com/scri...id=Aviator_CX6

vs

hypersonic ax6
http://secure.hypersonic-pc.com/scri...id=Aviator_AX6

vs

voodoo 780
http://www.voodoopc.com/systems/advanced.aspx?t=1&p=360

vs

voodoo 860
http://www.voodoopc.com/systems/advanced.aspx?t=2&p=350


i'm leaning toward the hypersonic cx6, because it seems to have a great price, 15.4 inch screen, good performance and is very mobile. I don't see any huge difference in terms of benchmarks between the processors so much as I do between the video cards(9700/9600).
The p4 systems do have the best graphics though. Unfortunately they get atrocious battery life and are very expensive and are usually rather large. The athlon64 books I like a lot as well because they have both great battery life and graphics performance, but they are pretty expensive. Any opinions on this. I realize that no matter what I won't get desktop performance but has to be a laptop because it's for work too