The original time investment is quite large, but yes it is worth it in the long run most definately.
It's just a case of deciding which one to choose.
[I.E One that provides content or one that doesnt]
I'm trying out AdultsAllowed [
http://www.adultsallowed.com/wm/index.php/3987] at the moment, seems to be doing quite well. Converting at around 1:212.