Goal: Run Win7 x64 full time, run 1 or 2 distros of linux simply for recreational purposes, run XP x86 sometimes for software that refuses to work on vista, run DOS occasionally. It would also be nice to have another XP to use for sandbox for untrusted software. If possible, I would like to do all this without having to reboot for each OS I'm a little overwhelmed with the options for this. I have an ASUS M4A77TD with Phenom X2, 4GB DDR3 @533mhz, Radeon 4870, and 3x 320GB SATA 3.0 hdds in RAID0. CPU-Z claims my processor supports AMD-V. I have a spare sata drive I can throw in here just to test things out. This box is for personal use, no servers will be hosted on it. I'm leaning more toward a bare-metal VM or JeOS but I'm open to any real suggestions. My technical level is decent, I've setup 5 different flavors of linux, hundreds of installs of windows 9x/XP/Vista/7, have taken some cisco certification courses, can follow nearly any scripting language etc, etc.