My office is looking at getting an iMac for video editing (and pretty much nothing else). We'd have an external drive so the HD difference would be negligible. We're looking at light/standard video editing for 2-10 minute pieces with FCP. Can the entry-level iMac (ATI Radeon HD 2400 XT with 128MB memory) handle that? I'd assume so as my iMac G5 does OK with FCP.