You can go for Edimax router...
If you are getting bundled ADSL model from ISP, you can go with any 54Mbps or 150Mbps router (Edimax offer (54M -> BR-6204WLg, 150Mbps -> BR-6324nL), cost below 2K.
If you just wants to use single router intead of putting separate ADSL model and Broadband...