Good point Chris.
If we narrow the question down to which APs are supported by a VX9K running 5.9.2, then that obviously narrows down the list of supported APs.
Attila...the point here being that even though a VX9000 has the ability to manage any of the WiNG-5 APs, there are certain APs that stopped being supported in WiNG earlier than 5.9.2.
For example, the 650/6532 last version of WiNG was 5.8.6.9. Therefore, if you're VX9000 is running 5.9.2, then you would not be able to manage 650/6532 APs. APs and controller need to be running the same version of WiNG.