Im buying a new Macbook Pro (15" 2.0 GHz) and I'm just wondering if its worth the extra £68 to upgrade to a faster hard drive? It doesn't seem like much but I'm a bit strapped for cash. I will be using it for a lot of editing in final cut pro and colour. I'm also buying a G-Raid 500GB/7200 external hard drive as my main scratch disk with FW800. So I was wondering if you think its worth the extra for the internal hard drive? Will I notice any difference at all when I'm editing using the external hard drive?