I came to know of Sabayon from Distrowatch. And no experience of working with Gentoo and Gentoo-derived distros, I thought of trying Sabayon in my virtualbox. And I am really impressed with a slick and serious OS.
As the OS claims to provide out of the box applications, the distro is is slightly heavier in size. 32-bit KDE is 2.4 GB, Gnome 1.8 GB & XFCE, the lightest, 1.5 GB. You can download