csebastopoli

Can someone recommend the best replacemet tires for my LS400. I like a smooth quiet tire. Can I switch form a V rated (OEM) tire to a S rated tire? What is the real concern? I dont plan on driving 130 MPH. I'm very easy on ther car but the only tire the shops will sell me are V rated tires that ride harsh and noisy. Anyone out there riding on smooth riding "S" rated tires? please advise. Thanks, CS