most have the wrong idea on a skimmer though, most just get one rated at their size tank, which is a no no. If one had the biggest skimmer one could keep in their tank, sump, this may be a mute subject.
Great point. For some reason there are (mostly inexperienced) people that seem to believe the skimmer is a magical device that makes nitrate disappear.
Depending on the intentions of the setup one skimmer may be the best choice over another and vice versa. Choosing a skimmer really needs some forethought into the bigger picture of the grand scheme. Just because skimmer A worked well for Joe in his 75 doesn't mean Jim will have the same results. The difference in nutrient removal methods being utilized needs to be taken into consideration when choosing.