x1850 or 1900 or 1950 will cost u more than ur budget. so forget them...
u should try for ati radeon hd2600xt or hd2600pro or nvidia 8600gt... whichever u can find in ur budget.
i cant find any of these at 3k... prices might have gone down.. since the last time i checked.. & 400w powersafe psu will do.. which cpu do u have?
my system config is as follows:
Intel Pentium D 820, 2.8 GHz ( not overclocked)
ASUS P5LD2-VM SE( has an Intel 945G chipset) with onboard graphics( GMA 950)
2*512 MB DDR2 RAM- 667 MHz (of clock cycles 5-5-5-15-21)
Seagate 160 GB SATA II HDD
a PCI sound card
Technotech cabinet with generic 400W PSU
17" LG Flatron CRT monitor
500W Microtek UPS