The Turanza Serenity tires are outstanding! I have used them on several cars in varying sizes:

SC400 with 235/50/17 on 17 x 8 inch wheels all around ......then 245/40/18 front and 265/40/18 rear with 8.5 and 9.5 inch wheels, respectively.

LS400 with 225/60/16 on 16 x 7 all around.

Always extremely quiet and smooth. They are even somewhat sporty with the 18 inch wheels and lower profile. Very, very highly recommended!

 

I wouldn't personally go with Pirelli especially for comfort wise. They tend not to last that long and have loud tire noises after awhile... Just from what I've heard at least. But ya, I have the Bridgestones on my oem wheels and they are very comfortable