My suggestion for a PC under 20K
1) Processor-->>Intel C2D E4400... Rs. 5200/-
2) Motherboard-->>GigaByte GA-945GZM-S2, price Rs. 2600/-
3) RAM-->> Gingston/ transend/ Hynix 1 GB 667 MHZ..price Rs. 1300/-
4) ROM-->> Sony double layer DVD writer-->> Price Rs. 1350/-
5) Speaker-->> Creative 2.1 SBS, price Rs. 1100/-
6) Hard Disk-->> Seagate 250 GB, price Rs. 2700/-
7) Cabinet-->> Any with 450 Watt SMPS, and a extra fan...price RS. 1000/-
8) Moniter-->> LG 17" CRT Flat, price Rs. 4500/-
9) Keyboard+ Mouse-->>Logitech set(multimedia keyboard and optical mouse), price Rs. 700/-
10) Onboard LAN, graphics card and 8 channel( 6 ports )sound card
Total->> 20,450
You dont need a dedicated sound card and graphics card for a PC under 20K .
@salilrane have not added UPS in list, let me add this:
UPS-->> APC 500 VA, price RS. 2200/-