In reply to ilona zonnenfeld's post on Sun 5 Aug 2012 :
Ilona, you might look at the Apple refurb 17" MacBook Pros. The express card slot, which was only on the 17", lets you add additional firewire or ESATA connectors. I don't understand why they discontinued the 17" – it's a great editing platform. I think the October 2011 model was the last one before being discontinued.
In general, an i7 processor is faster than an i5 processor so don't go by the Ghz rating of the processor – you have to find independent speed tests. And even then take them with a grain of salt. Disk access speed is as important for video than raw processor speed (as long as it's a reasonably fast computer.)
I don't think you can buy Final Cut 7 any more, but it still works fine if you've already got it. FCPX can be useful for short web work but is not what you want for a feature film. I don't think you can get by anymore with just one editing program....