When choosing a corner audio cabinet, you also need to assess the degree of protection you need. Your options can basically be boiled down to open or enclosed.
As the name suggests, the open type means that the audio system is exposed to the open air. This type may offer the least amount of protection, but it's generally a lot cheaper compared to the enclosed type.
Enclosed means that there's a type of encasing that protects the audio system. It may be in the form of wood or glass. This type is a good option if you want to protect the audio system from sticky hands, dust, and the elements.