Help me configure a tower only < 10k

[pcbuy]

Budget less 10k
Core 2 *
2-3 GB DDR3 memory - in one piece
DDR3 motherboard expandable up 8 GB DDR3 memory
Lan card
Anything else needed, like cabinet, fans whatever.

I would take the box and plug into my existing monitor, keyboard, mouse.

Location: Kolkata.

[pcbuy]

Studying around seems AMD could also be an option.