The highway scene was definitely badass.
My favorite scenes in order were:
1. The fight scene vs. the multi-Smiths
2. The dance/club scene [Come on, now. It was cool as shit. Beautiful.]
3. The highway scene. Yeah, wow. The fight on top of the truck was nice. Blurrr.
4. The architect's speech in the TV room. Def.
5. Neo speaking to his followers [the Gandhi scene] ;-)