I've used Virtual Box for years and I've yet to see a compelling reason to switch. I don't care for 3D and anyone who does should not be running a VM anyway. Virtual Box has been 100% stable for me ...
Parallels has released version 5.0 of their "Desktop" virtualization package for Mac. Lets hope this solution's graphics enhancements fare better than those in VMWare's latest version of Fusion.
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