This used to be such an easy question. Damn Gnome developers
I'd probably still recommend Mint. Even if i do have problems with Cinnamon they're not as big as problems with Unity. But you should at least look at a few others, see what you think you might prefer. Those being Debian, openSUSE, Fedora, Sabayon and something i think might be the one to keep an eye on for newbies -
Chakra.
It basically comes down to if you get on with KDE (which i've heard has been going in a good direction of late) or some flavor of Gnome 3 (which, frankly, hasn't). Personally i went with XFCE, but that takes quite a bit of customization to get looking 'nice' so i wouldn't really use it as a beginner unless it's on a much slower computer. I don't think Mate is quite ready yet.
EDIT: Just saw the computer spec in the OP
It might struggle a bit with KDE... and Gnome 3 now. Depends what you'd be doing with it. But it might be worth checking out XFCE or other more lightweight DMs, maybe the Fedora spin or in Debian. I used Peppermint for a while when it first came out, it is nice, i just wanted a little more.