I dunno, I like the poetry and imagery of the 2003 Hulk, but the weightless nature of Hulk and his movements always killed me. Norton's Hulk looked better, moved better and had better action sequences. Add in the fact that Ed Norton is roughly twelve times the actor Eric Bana is is, and you have much better movie.
As far as Iron Man, I really believed in Norton's Hulk more than RDJ's Stark. I know that's practically blasphemy around here, but when I saw Stark, I saw Robert Downey Jr. mugging it up, when I saw Edward Norton, I saw Bruce Banner, I saw a tortured soul and I saw a man seeking redemption. Throw in a GREAT end sequence with Abomination and Tim Roth's very capable Blonsky, opposed to Obidiah Stane being evil just because he is, and I really think you have a better movie. Hulk was geared more toward fans of the character, where Iron Man HAD to introduce people to the character.