I've been looking at both of these and have pros/cons about each. The biggest being data logging for the Neptune - but then you have to pay $75 extra for the SW. Reefkeeper customer support has been very slow getting back to me about my questions (they haven't responded at all).
For those of you that have one or the other, why did you decided to go that way?
For those of you that have one or the other, why did you decided to go that way?