I plan to buy a 14"/933/G4 ibook/640ram/with external 7200rpm HD for DV editing with FCP4. (Powerbook is out of my budget)

Did anyone load the FCP4 in your ibook for DV editing as well? If yes, may I get some information about the performance such as real time effects, drop-frame and smoothness of such application?

I always will load about 1 hour footage in the project and do the editing with simple effects. Thanks in advance!