A simple Desktop PC configuration which would cost you around 24 k to 25 k..

Processor : AMD Phenom X2
Mother Board :  Gigabyte 880
RAM :  8 GB
Disk Drives  : 500 GB
Optical Drive : LG DVD R/W
Monitor : Samsung LED 20'  (22' would cost 2000/- extra)
Cabinet : 1850/-
Will be given 2 goodies of your cost which would not cost more than Rs. 500/-

AMD over Intel  : AMD Phenom X2 is equivalent to Intel  i5 but comes with 7 MB Cache  and way too cheaper comparatively.