If I were to trade in my S2k....in all honesty the only car that I would outrightly replace it with is.... Another Suzuka Blue-metallic 02 with less mileage.
There are other cars that I want to own, but none "instead of" Stewwie. he's the only car that can fit his niche in my driving pleasure.
Cars that I would ALSO like to own would be a 2006 Subari Impreza STi with no options, a 1988 Honda Civic DX sedan with a nicely built K-series engine but stock look and sound; and a 1988 Honda Prelude 2.0Si 4WS modified with 6" more headroom and an H22 (again stock looking and sounding).
Stewwie will always be my fun joyride car, the Subaru would be for winter, Civic would be DD, and Prelude....well.... I'll always have a special place for the 3rd gens. Mechanical 4-wheel steering is just too unique to live without
