What is the best type of Rubik's Cube?
That depends on what you expect from the cube, like speed,
stability etc. If you want a fast cube that is capable to cut
corners very well, I'd suggest either a type AV or an F-II. Also
the ShengShou and the Dayan ones are awesome. You can buy those
cubes at Lightake, which is a popular and trusted speedcubing store
or Amazon. Check the link below.