Ok the cards that i am talking about are from this chinese company i saw in malaysia approx 900-1100, i assumed prices would be around that.
Routers from net gear have come down to even lesser than 3000rs, net gear is also cheaper, but as the raven said 6k and above would have to be the D-Link category.
As about the coverage, since nikhmail did not comment on what kind of a coverage area was he talking about , so i suggested a wireless network.
I personaly am very happy being on a wireless network (netgear router WGR-614) and i think nothing beats it. Much lesser hassle too. Less hardware problems.