Lewis Cunningham has a post titled Kubuntu and Upgrades all Around.
Considering i just hit the ubuntu bandwagon by upgrading my spare windows workstation and installing Oracle Xe . I was very surprised at the look and feel . Although i heard a lot of people dont like the fact that root is locked out by defauly and you have to sudo to do everything. i would say that is the way to go. if i need root i can always unlock it or better yet learn to use sudo more often and make a good secure lifestyle.
Anyways ubuntu looks to me like a stable and to go for distro for home and office so i might take the leap and get it to work at home one of these days