I think these Eclipse 12-gals are great tanks (I have one, and a 15gal glass Eclipse as well) but I think if you are starting out a larger tank is going to be better in the long run. I can't tell if you have other tanks, but for a first tank something like a 46 bowfront (since you like the curved look) would be a good choice, or even a 55 gal
($99.00) for the tank at PetSmart is a good choice. They are so much easier to stock and to keep water quality under control.
The Eclipse 12 is a tidy-looking tank because of the filtration in the top, but it is minimal filtration, so stocking needs to be kept to a minimum. I grow plants in mine, but only java fern and java moss, along with crypts, all low-light plants. I don't know anything about the Odyssea, unfortunately.