Re: KDE 4.0
KDE has always been a problem for me as well. I tried Kubuntu 7.04 again the other day and it took a while for a few hardware pieces to start working correctly. I've never had that problem with any version of Ubuntu (Gnome).
The newest version of Ubuntu comes out in another 2-3 months, same with Kubuntu and Xubuntu so keep an eye out!