Great. One other task regarding the Keychains. On the MacBook Pro, via the Finder, open Keychain Access in your Applications>Utilities folder. Then, in the Keychain Menu select Keychain First Aid>Repair. When complete, close keychain access.
Last step, Utilities folder, open Disk Utility. Highlight your HD on the left, then select "repair permissions".
Those steps will ensure that the data files transferred over from the iMac conform to the MBP's file permissions and no errors have occurred in the transferred keychains entries.
Good Luck with the new machine. I have a unibody MBP I bought last October. I really like using it.