rmriggin...way to bring up last year's threads
but while we are brining back the dead, here are my comments on what you said:
MEPIS -- not quite sure about the *latest* (beta) release but stable is suffering MAJOR memory leaks due to poor KDE configuration most likely. some other kde 3.5 features broken as well.
KNOPPIX -- not designed to be a harddrive installed distro. it was built as a live cd and shall remain so. too many people have screwed up dependencies in that distro b/c its an obscure mix of debian unstable, testing, and some custom packages that once you do an apt-get upgrade all hell breaks loose.
to throw in a contender: PCLinuxOS 2007 (currently Alpha...final coming soon) -- great.. based on mandriva originally, but as of 2007 the desire of the project leader (Texstar) to move AWAY from mandriva is burning so it is one of the most important priorities of the project for the 2007.1 (perhaps 2008) release. comes with many media plugins out of the box, installations are done through RPM packages...but it uses APT for RPM and Synaptic so you really can't tell it apart from Debian if you dont know what to look for. May i add that its also FASTER than Kubuntu and doesn't have the memory leak issues of Mepis
perhaps i'd maybe even throw Sabayon (gentoo based) and PC-BSD (FreeBSD) into the mix....both still working on things...but coming along nicely.