aside from a harsher ride and negligible gains in cornering the larger diameter wheels will transmit more road noise into the interior and be more susceptible to road damage from pot holes etc. They will also take away some of the cushion at the point where the tires break loose under hard cornering, meaning you will get less warning or feel when this will occur because of the reduced side wall. These are of course nitpicky reasons and a true evaluation must of course occur by the seat of your pants trial and how good the roads are where you will most often be driving.
keep in mind my opinions are free and only worth that much
enjoy your dilema, life is good