I made the switch from 185/65/15 to 195/55/15
Pros : Handles slightly better, tyre is 195mm wide now compared to 185mm before.
Cons : Speedometer under reads now. (Indicated 100km/h on speedo when in reality around 88km/h on gps), looks slightly smaller on car but can live with that. Ride a little bit harsher due to lower profile.
I would choose 185/65/15 next time round. Lazy to calculate speedo error... haha