well, i just saw where matt rogers did a little post on it... not much info though... but yeah... here's something that may be helpful...
ProSeries4
another thing i just realized is that i've seen these around before, but looking at the doctors' catalog, their pictures show up really blue and stuff, whereas the other pics seem more like a subdued, tinted blackish blue or whatever... maybe its just part of an upgrade or something... tomaquarium says 700gph, F&S say 1000gph
another thing that turns me off is the fact that it uses an airstone for the protein skimmer... i don't know the details of which style of skimmer is best or whatever, but i've heard that using whichever one uses an airstone is not effecient at all... or maybe its just that they don't like having to replace the stones when they clog or whatever... i've just heard that airstones in a saltwater aquarium are always "iffy"...