Gentoo still dwells on my fourth desktop and is doing good. I'm writing this entry with Drivel, launched in Gentoo chroot. The base system took some work, but the rest of software that I need, installed with no effort. The only things left are the customizations like the audio card setup and home network with an ethernet-wifi bridge. And I think I'll miss the Dropline Gnome look. Or I'll move it.
So now, I "just" need to move the new system to the main partition, which is a RAID1 on two hard disks.