to buy WiFi Routers

i Want to buy a WiFi Router
the Budget under 2000RS.
Any Compnay i dont have any specific company in mind

So can anyone pls suggest me a good WiFI router, & the range should be as maximum as possbile.

i Have 4 rooms, so the range should be good enough so that it can cover all teh 4 rooms.

In past i have tried these 2 routers of my Friend :-
1} Belkin N150
2} DLinK DiR-600

All of them werent any better they woudnt give me signal in all the rooms.

PlS. can anyone help me out with a good one