Use Fedora. They're backed by Red Hat, a company that actually still gives
half a damn about "linux" and freedom, the primary Fedora has the GNOME 3
Shell interface which is somewhat similar to Unity/Mac (as pretty, and
lighter to boot), and Fedora has a very strong policy of including only free
software that is VERY similar to Debian's social contract (though they have
made an exception for kernel binary blobs). Fedora, like Debian, is all about
the upstream, and unlike Debian, they're also about bringing you the latest
cutting edge software very soon after it gets released. On top of all this,
Fedora is released on a roughly six month schedule, much like Ubuntu (but
without a firm release date).
Use Fedora 18 and the result is win all around.
I will always shamelessly plug Fedora into these discussions, because I find
it recommendable on so many levels.
kernelKurtz, I remember when my Ubuntu 7.10 mailed CD proudly advertised
"Linux" heritage and Ubuntu being "software libre" that was ready to share
and pass on. Those days are long gone. Marc Shuttleworth has big time Mac
envy, has the scantest interest in good upstream practices and the whole rest
of the FOSS community, and he's ready to spread all the FUD and hype that
will get him that next little slice of media attention.
I still say: base on Debian testing branch, and merge with gNewSense. Ruben
has a full two years to make that kind of plan work.