if you're into casual pc gaming and net surfing, buying a pc is extremely adequate and cheap
I built my 1st 2 pcs...and of course my 5th. My 3rd and 4th I was annoyed with how cheesy the pc industry was (hated all the over heating oc frenzy that went on and still does!
IF casual gaming you should just pop $300-400 on a branded PC. BASED off my few years old rig I got for the same, yours should be almost twice as fast for the same price, or 3x so if you want to spend $800.
dxdiag of old/current system (until all my new parts arrive)
Time of this report: 8/3/2006, 09:56:42
Operating System: Windows XP Home Edition (5.1, Build 2600)
System Manufacturer: HP Pavilion 04
System Model: P8635A-ABA 752w
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel(R) Pentium(R) 4 CPU 2.26GHz
Memory: 1024MB RAM
Page File: 378MB used, 934MB available
DirectX Version: DirectX 9.0c (4.09.0000.0904)
vid card: Nvidia GForce4 TI 4200 agp 128mb
Now I posted that because I just finished playing the Demo of Titan Quest. A little choppy but not too bad man!