The Ubuntu 12.10 distribution has just been released. Download a copy here: http://www.ubuntu.com/download/desktop/alternative-downloads. Despite the many problems experienced by users of the Unity desktop in the past it is developing, and is quite a usable desktop with a good search function that can find available packages in the software repositories as well as media files on your hard drive. The next release after the Quantal Quetzal is Raring Ringtail; this is named after a ring tailed possum. This is a very popular Linux distribution and I am sure that Ubuntu 13.04 will be as popular as this release is proving to be. I use the Unity desktop on Linux Mint 13 occasionally and with a fast enough computer it is smooth and usable. The ability to make the launcher icons smaller and change the size of the dash are two things that make a big difference when you are using the Unity desktop on even a large monitor. But you may type sudo apt-get install xubuntu-desktop if you want an even smoother and faster desktop than the Unity environment if your machine is not up to the specifications demanded by Unity.