To tell the truth it depend on what you are looking for. I find all of them lacking in some category or the other, and being the kind of person that likes things setup MY way, I have never been really attracted to any of them because of the built in filtration, the built in lighting etc.
Unfortunately with the items listed I think you are comparing apples to oranges since you have the Eclipse which isn't even marketed as a nano reef system and the only thing it includes is a single CF light and basic cartridge style filter. The Aquapod and Biocube are pretty close in terms of what they offer and is actually a pretty good question if you are comparing those two. The Red Sea Max is two to three times as much as the other setups in the poll. Then you forgot to put the Nano Cube on the poll.
If you are looking only at price, then the elcipse would win, but you'd have to add lighting and water flow. I'm not a big fan on the filtration on any of them, even the Max because my experience with that particular built in filter is that they are next to useless. The lighting really depends on what you want to keep.
Basically what I'm saying is that choosing a best is impossible, because everyone has different needs.