I got an Acer Ferrari 3000 with an Athlon XP 2500 Barton, 512mb DDR PC2700, 60GB HDD,
and Radeon 9200 128MB graphics card
I can play quake at 1024x768 with full details at an average of 200fps
Call Of Duty 1024x768 32bit at an average of 80fps
Far Cry 1024x768 32bit with all Medium details at an average of 35-50fps
Far Cry is massively graphics dependant so you might be able to run that at 1024x768 at all medium details, the P4 2.8 should help quite a bit
If you want an exellent gaming laptop that can play Doom 3 and HL2 with no problems, try and get a laptop with a Radeon 9600 128mb or Radeon 9700 128mb graphics card
________________________
MSI KT8 NEO
Athlon 64 3200+ @ 2.0ghz
1.0 GB DDR PC3200
2X 160 GB HDD
Hightech Excalibur Radeon 9800 Pro Iceq 128mb
( Core 425 MHz and Memory 380 MHz )