lower profile tires with bigger rims will stiffen the feel greatly
17 or 18's work best
sounds like tundra quoted a basic stat of lexus not meaning to offend anyone,that is why he said "no offence". He didn;t make it u it is just a commen denominator of the lexus equation,don;t blame him for mentioning it .You may not like the idea but it is based in fact.
other than the IS Lexus isn;t aimed at pre 40's and aren;t really priced there either.