If you were going to get a dwarf hamster, I'd get the Hamster Heaven. A syrian, I'd get a 100cm cage. The only other 100cm cage I know of (apart from the Ritz, Volta and Plaza) is the Ferplast Criceti 100 - which is also deeper. But costs twice as much. Top opening only. You might find a second hand Barney cage on ebay if you're lucky!
Ferplast Criceti 100 Hamster Cage