That Asus AC66U is good stuff.
But Jack, you're reversing the country he's. The Tenda is expensive (and non existent) to us because we're over in the US. Switch over to Amazon.in. The Tenda D303 is 2,000 Rupees. The Asus 66U is 13,500 rupees. Also, the Asus 66U does not have a ADSL2+ modem, it only supports ADSL/VDSL natively. All that being said, this forum probably won't be as much as help as it's very heavily American based, and where we use DSL, we are required to use the service provider's modem, then bridge it to our routers. Where you're at, you can pair your DSL with everything that supports it. Just at first glance, I see nothing wrong with the Tenda, but I can't say of anyone having experience with it.