iPod Syncing iPhone with new itunes library

[JoEw]

Ok about 1 week ago i purchased my new quad core imac i transferred all my files including my itunes library (music, podcasts, videos and apps all of it). Now i need to make my new imac my default itunes library for my iphone, but to do this itunes is saying i must delete ally stuff off my iphone and put it back on again. I am fine doing this but i have a few concerns.
-What exactly will itunes delete off my iPhone? My pictures, contacts anything like that?
-Will all my app preferences and game scores be deleted when itunes resyncs them?

If anyone can answer my questions i would really appreciate it.

 

[Consultant]

You should have used Apple's built in migration assistant designed to save user time, and transfer the files properly.

 

[JoEw]

can you tell what stuff will be deleted when i resync? Is it just my apps, videos and music that will be deleted then resynced. Or is it gonna delete my contacts and photos aswell?