G4, because it's the only LS I have been driven.
it's actually my dad's car, but I almost drive it everyday to work with my dad because he likes to sit in there more than drives it. At first I thought the style and performance of the LS430 are very dull. Then I change my view after drove it for sometime. It's the most refine and comfortable car I have drove. ride quality is a lot better than my SC with run flat.
I am sure G1, G2, G3 are also having very good ride quality.