You may want to check out the comments in the Steam discussion. Ignoring the troll posts it is interesting to see the question and comment made by a group of gamers who are mostly outside of the hobby of tabletop RPGs. Also there is more than a few "How do I get started with Pen & Paper" questions. It would be nice those veteran tabletop gamers with Steam Accounts took the time to answer. New blood always helps the cause.
I blog around Fantasy Grounds here.
I compared Roll 20 and Fantasy Grounds here. The only thing I will add that last Monday I experienced my first downtime with Roll20 (lasted for a half-hour).
Right now I consider Fantasy Grounds and Roll20 the two choices. Likely this remain so in the near future, mainly because they have two fundementally different approaches for presenting a tabletop. One is standalone software that each member of the group have to own. The other is a web based app that has a subscription fee of up to $120 a years to get all the bells and whistles. Which one works bests depends on the individual. In terms of overall quality they are equally good.