If you could choose parts from the A4, 330i and IS300 and somehow fit them into one car, what would you do? This is what I would do.
body: IS300
engine: 330I
Interior: A4
transmission: A4 (quattro)
wheels: IS300
suspension: 330I (sports package)
body: IS300
engine: 330I
Interior: A4
transmission: A4 (quattro)
wheels: IS300
suspension: 330I (sports package)