Most of what I've seen those guys do is SW, and I have no comment because I don't have the first clue as to what's good and what's overstocked. Really the only FW I can remember seeing have all been Malawi Cichlid tanks (That refrigerator tank was pretty cool, but I image would be a PAIN to keep looking algae free and clean), and those tanks are usually over stocked even in home tanks due to the aggression of the males.
I personally prefer the look of the natural tanks, that is reef tanks and tanks without TV's in them or giant tacky decor lol.