I love your ingenious wooden-cube bottle holder Snickers! Is that just a Classic water bottle fitted into the cube? It`s a great idea for having a bottle inside a tank style cage as many have holes that are too high for dwarf hamsters.
I`m a big fan of the Gabber Rex (just bought a dodgy one off ebay and set it up for my chinese hamster!) but removed the sliding grid in the lid and made my own `lift-off` barred lid for better access.
The Imac Bingo seems to be a really nice alternative for all dwarf hamsters given that only the Zoozones and the Duna Multi are the other alternatives, or second hand Gabbers that pop up from time to time. Good size and good access. I`m not keen on the basin-style base though that could have been squared off I feel, but otherwise, a nice enough habitat. Decent price too.