Thanks for all your help, everyone.

I think I've narrowed it down to a smooth ride and that 'chubby' look, buy American:

Bridgestone Potenza RE760 Sport -- a lower priced tire, asymetrical tread, rated #1 in ride comfort, in the fatter sizes 235/40R18's and 275/35R19's. I'll buy them from TireRack, but you guys should be aware of the tire/wheel comparison tool in the Rims&Tires web page. A big help in making decisions about buying new rubber(s).

Thanks again.

BTW: $800 delivered.