Hi all, I'm thinking about building a computer. I'd like it to be a high end system capable of running 2 or 3 operating systems at the same time. What hardware(case, motherboard, hard drives, processor, etc) should I be looking to get? I think I'd like to run Ubuntu and and Windows XP, but I'm not sure if I want to run XP through Ubuntu or Ubuntu through XP. Which would give me the best performance? Also which VM software would be recommended? I only have experience with virtual box, so I'm not sure how it compares to others.