Depends on your budget.
BTW Im using Dunlop ECO ant its perfect.
Previously I was having Kumho and they was good aswell.
and Can I Put 13'' Tyres In Khyber With Out Any Modification. By Default it have 12"
Yes you can upgrade to 13" or even 14" with the profile being a little lesser.
But for normal drive I will say donot exceed 13".
165/65/13 is the best size or if you plan to keep the 12" rims then 165/70/12 is perfect.