There are many bikes but if you can suggest me your budget then will be easier to suggest you the best bike.

So many bikes are available in India but which is looks like you Mileage and performance wise, I have in knowledge that Honda Recently launched new Honda Stunner CBF bike.  It's a great sedan bike in this segment, Now talk about Mileage and performance. According to some website report that Fuel economy in Highway 61kmph and city 52kmph and fuel tank capacity is 13litres. it's a good mileage bike according to report. and i can compare to same range bike like TVS Flame 125cc and gladiator bikes. They has not better then Stunner CBF bike, Now performance also a good but they has also a 125cc bikes that means should given good performance but compared to stunner not better, and other think to Stunner involve looking wise it is so splendid, Honda has used very refined engine for Stunner CBF. and bike no requires less maintenance on pocket money.
 

stunner