I'm just about ready to pull the trigger on a MacPro that I will use primarily to edit and burn movies from footage taken with a Sony high def camcorder. The ability to add several hard drives down the road is very attractive for video archiving purporse (I'm making movies of my 18-month old daughter). I'm fairly certain I won't use this machine to play games and I don't do much with pictures beyond Photoshop Elements although I am considering Aperture. I might graduate to Final Cut Express but so far I've been very happy with the output from iMovie. I'm not afraid to do upgrades myself so I don't need the system to be loaded out of the box. What configuration should I start with? Thanks in advance for your input.