My system is almost 5 yrs old and have not upgraded it ever since. Had bought all the part piece by piece and had assembled it myself. Thereafter I've not been in touch with the latest techno stuff and hence, am planning to align myself for the next year's upgrade..
Core2 Duo 1.8Ghz (had bought it on the day of its release - I may try overclocking it but will need expert guidance)
3 GB DDR2 633Hz
Intel D945GZIS Motherboard
450W power supply
17" CRT monitor
500GB + 320GB HDD
Gamepad - similar to PS2
Motion Sensor pistol for shooter games
Budget is the best and lowest fit to run games like Mafia2, COJ3 or COD latest.. dont want to spend on upgrade since I'll part off with this system next year as am sensing few mind freaking updates from internal sources on Intel. Hence, waiting for the new developments.
Next year wont mind to shell out $1500 odd to have a new machine and hence, am limiting myself for now.