Increase budget to around 22-24k and check out
Khs vitamin B
scott sportster x70
gt traffic 3
If you strictly cannot increase the budget or these bikes are not available in your area then you can either get
montra blues/jazza 16-18k + accessories.
La Sovereign navigator 13k + accessories.
But these bikes will not be in same class as the above bikes. Also remember you will need to spend some money on accessories too.
If this is your first purchase i will recommend you go for
Rockrider 5.0 (9.5k) + Slick road tires and tubes ( After your first ones wear out.. 1.8k) + Helmet (~1.5k) + Lock, light , pump , puncture kit, saddlebag, fenders etc (3-4k) = Total of around 16k
2013: Honda Amaze (Ultimate upgrade).
2013: Rockrider 5.0