There is no such thing as a standard controller keyboard simply because they have so many possible uses. Any purchasing decision should be based on the keyboards intended use, which will determine which of the many features detailed in this article are required, and which are superfluous.
Finally, its worth remembering that 88-note hammer-action controller keyboards are heavy and should be lifted with care. For both stage and studio use, a sturdy stand rated to support the keyboards weight is a simple health and safety requirement. Thanks for reading, get ready to take control!