Processor: Processor: AMD Phenom II X2 550 - 5.2k or Athlon II X4 620 - 5.3k
Motherboard: Asus M2N68-AM PLUS - 2.3k
RAM: Transcend 2GB DDR2 800MHz - 2.1k
GPU: Palit 9600GT 512MB DDRIII - 4.5k
HDD: Seagate 500GB SATAII 7200.12 series- 2.4k
Cabinet: Zebronics Bijli ATX - 1.1k
SMPS: Zebronics Pro(Real Watts)-350W - 1.5k
Optical Drive: L.G. GH22NS30 SATA/Samsung SH-S22F SATA - 1.1k
Speakers: Altec Lansing 2.1 BXR1121 - 1.1k
Monitor: Samsung S2033SW - 7.3k~
Keyboard: Samsung Pleomax - .2k
Mouse: Logitech Optical - .4k
This rig will cost you 30-31k. Very balanced and powerful rig on a 30k budget.