Ok, lets settle this once and for all.
Rubiks only make cubes in 2x2, 3x3, 4x4 and 5x5 sizes. There are cubes of other sizes available, but they are not made by Rubiks.
The Rubik's Revenge is a 4x4 - not a 9x9.
The 9x9 was designed by Verdes (makers of V-cubes), but not released so far. Since the plans to make them are patented, they are a matter of public record. A chinese company used them to illegally make a 9x9 and an 11x11. I can't comment on the quality of the 9x9, but I have a friend who loves his 11x11.
Some people have had bad experience with KOs. I own several and find some are very good. Better quality ones include My Fisher Cube (official, but originally made by the KO people), windmill cube, axis cube, mastermorphix (both pillowed and non-pillowed), and mirror blocks. Poorer ones include my rainbow cube and my face-turning octahedron.
Please take off topic discussion off this forum. Thanks.