I'm ashamed to say that I haven't even installed arch yet. I am 'preparing' for it. I stopped myself when it came to 'preparing the hard drive' in the installer because I'm having second thoughts... I don't know if I can be bothered having to maintain my system constantly. I like arch for it's simplicity and freedom but not sure if I'm ready to work for it. Maybe I'm more of a work-out-of-the-box linux guy. I'm wondering if I'm over-exaggerating the effort and time needed to maintain my future arch system...
Ah. If you follow the beginners guide for installing Arch, you should be just fine. Theres a few things Arch differ from Ubuntu, but its to the better I believe. Arch doesnt have any fancy "One-click-fancy-GUI-install-for-lazy-people". But with Arch you get a WAY faster computer, I installed both Debian and Ubuntu on my older computer about 6 month ago (Intel E8400 @ 3GHz) and the difference was huge. And with Arch you dont need to make a huge update every 6 month, they just pushes new packages when they feel they are stable.
For me Arch just keeps working, I dont need to maintain it or waste hours of keeping it floating. It just works and lets me focus on what I really want to do atm. And the package manager Pacman is so freaking fast, I doesnt take a whole lifetime to install a package and if you need something thats not in the Arch repo, just look for it in the AUR repo. You dont need to add some PPA wich could contain a lot more packages you never asked for.
I believe that Arch is way easier than Ubuntu if you have basic knowledge of Linux and not are afraid of learning something new. And I dont dislike Ubuntu in any way, it just doesnt fit me anymore. Im still admin at Ubuntu Sweden to.