How to choose the right emacs on Ubuntu Linux

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Hi,
I've been using emacs-snapshot for a while for anti-aliasing support.
But now since emacs itself supports anti-aliasing fonts, I'm now
left with a dilemma, which one to use.
So next I went to find proof of which is latest and bleeding edge.
and saw the version. emacs-snapshot is of course the
latest(23.1.50.1)
but uses the old GTK+ (2.18.0) version. The emacs package
version is older (23.1.1) but uses a newer GTK+ (2.20.0) version.
Can someone provide the pros and cons of each and which
one might be better to use ?

Thanks.