I am purchasing a new Mac Pro and ACD to replace my G5. I record a ton of HDV video in 1080i of my kids sporting events and burn them to disc using iMovie 06. I want to start using Final Cut Express and get a little more advanced. With HD video in 1080i using over 15 Gig per hour, I need a system with a ton of memory. Here are my questions: 1. How much RAM would you recommend? I had planned on 4 GB 2. If I have all four hard drive bays with 500-750 GB, would I need a RAID card? Why would someone need a RAID card? 3. If I only use 1080i video for personal use (only video shot of my kids) and no commercial blu-ray movies, can the current ACD display a home movie burned to blu-ray disc using third party blu-ray drives and burning software? 4.For hi-def video, does anyone have a recommendation on th ATI Radeon HD 2600 XT vs. the NVIDIA GeForce 8800 GT? I realize that this might not be the best forum for all three questions, but I really need some advice from the forum before I spend a chunk of hard- earned money. Thanks in advance for any recommendations/information.