Persoanlly I would recommend LibreOffice (3.6.1) over Apache OpenOffice (3.4.1) .... but either over an original OpenOffice.org (the last of those being a 3.2 por a 3.3 beta).
If you want to keep up to date with it, it’s worth noting that the Libreoffice people have a strict, regular release schedule.
They do a bugfix-only release once a month. These are the third digit in the version number, as in 3.6.0, 3.6.1, 3.6.2 etc, where 3.6.1 was the September one, and 3.6.2 is due first week in October.
They do a main version release (new features, non-bugfix changes, ripping out old bloated code and methods and replacing with new etc) every six months, and that’s the second digit in the version number, as in 3.4, 3.5, 3.6, 3.7, where 3.6.0 was in August, and 3.7.0 is due next February. They usually run one or two final bugfix releases on the last version over the two months after the next main version comes out, in parallel with the first two bugfix versions of the latest main version..
Release plan on http://wiki.documentfoundation.org/ReleasePlan.
Oh for DAZ DS development to be so organized and predictable ...