An honest suggestion is to keep the size to OEM if you want your car to be fuel-efficient, changing the tyre size will eventually end up consuming more fuel.
If you want the best value to money tires, you may look for Continental UC6/CC6 or Yokohama Advan dB v552 and if you have budget constraints, then Bridgestone or Dunlop will be the next best value to money but are relatively hard tires.
The rest is your choice.
Hope it helps.
