Well, the KDE interface is the one most similar to Windows. So the "OS shock" (kinda like culture shock from going to one country to another) of transitioning to a linux OS would be least felt with the KDE GUI. I am dealing with a family of novices here, after all

Besides, from what I read, Unity is more designed for touch screens and netbooks. I dunno the reason but the kids prefer their 15" LCD over a larger unit. If I start to even think about why, my brain would probably have a reactor meltdown (kids....) .
I've used Kubuntu and Ubuntu in the past, so I am somewhat familiar with them. Otherwise I've never used any other linux OSes besides Telnet (is Telnet an OS?) . Also there's so much Ubuntu support out there and I know I NEED support as I would consider my knowledge level a 3 on a scale of 1-10 for Ubuntu.
BTW, I've already installed Kubuntu for them and so far they've adjusted to it just fine. Handbrake works for their dad. Internet browsing is the same and most required software comes preinstalled. I installed Edubuntu software package for KDE so that the kids can use the educational software. The only small downfall I'd say is the Wine support for windows games. They can't play Sonic Adventure because the sound doesn't work, so I gave up on it. The internet usage can be controlled by parents now + game usage, so parents actually like this OS. Had to get a printer that supported Linux, but they're happy with the new printer. Oh, NO VIRUSES YET!!

So I'm happy!
