I'm planning on using my Dual 2.5 G5 (When it comes in...) for video editing. I'm currently running FCP3 on my iMac. What I'm wondering is, can anyone tell me how much of a difference in speed/render time there is between FCP3 running on a G5 and FCP4/HD running on a G5? I'm hoping to wait to upgrade until I can afford it (I still can't afford the monitor yet ), but if I have to upgrade sooner rather than later, I will. What are your thoughts?