SkyTeam - Skyteam FF program of choice

As a potential new ST joiner from Germany, I am looking for the ST FF program of choice.
Having yet accumulated miles at ST, which program gives me currently the biggest advantage related to quick achivement of Elite levels, benefits, etc.

Regards from CGN

Have a look at the website (http://www.gnopps.com/skyteam) that Gnopps has created for a good overview.
In general I think that OK+ is the best if you mostly travel around Europe for the complimentary upgrades and 200% earnings on most C fares. If you fly all over the world, Flying Blue is probably a better idea, as you can earn miles on many non-Skyteam carriers and take advantage of webawards and perhaps the odd op-up when flying AF/KL.