The reason you get lots of "games" is because its a feature, i.e. the company doesn't pay £39.99 for them like we do, it buys them in bulk at about £2 a go - the Half Life 2 game is just a voucher last I heard, good luck getting a game for it.
As for your system, get a X800 Pro is your can obviously, the 256MB 9800 XT is an amazing card for every desktop application.
You definitely should not get the Corsair 4000XMS, its a problem with trying to get your CPU FSB speed to 250MHz to get the performance from it.
If you do get your FSB speed to more than 230MHz then you memory should be the 3700XMS, the Corsair 3700XMS will keep up with your FSB from 230MHz +.
[size=0.5]Full Aluminium ThermalTake Case
AMD Athlon XP 3200+ *400 FSB* Barton (2.2GHz)
ThermalTake Volcano 11+ Xaser Edition Air Cooling
1024MB Corsair TwinX XMS 3200 (Dual Channel 2x512) 2-3-2-6
256Mb XFX 7800 GS EXTREME
2x WD Raptors (10krpm 8MB Cache) 36.7GB using RAID -0
Video Logic SonicXplosion 5.1 Soundcard[/size]