Whether you go smaller wheel larger sidewall tires, or larger wheel smaller sidewall tire, in the end its up to the look and ride you want. You will have more room to air down your tires for traction, and will have a more cushiony ride with smaller wheels/larger sidewall tires. When you have larger wheels and smaller tire, your vehicle will have better on road handling however the ride isn't as "riding on clouds" as would a thicker sidewall tire.