Kubuntu has less softwares in the repository? Kubuntu is not a different OS. It is the same as ubuntu but the only difference is the KDE. I converted my ubuntu to kubuntu recently as I always have been an avid KDE lover. I can also install XFCE to call it Xubuntu if you like
I do agree Ubuntu is better than fedora etc. I used Synaptic on Gnome and am using the same thing on KDE. apt-get and its gui i.e. Synaptic are cool.