which big-iq version best on esxi ?

neeeewbieSadly I don't believe F5 keeps a record of builds that work best as they are suppose to support most/all hypervisor OSs. I think Kai_Wilke is spot on with his response but I would always recommend going with the latest version 17.0 rather than the latest long-term 16.1.3.2 for a fresh install, especially if patching and upgrading is a long drawn out process where you are. Just make sure you allocate the minimum recommended resources by F5 otherwise when you start provisioning the BIG-IQ it will crash over and over. Sadly the BIG-IQ is not like a normal VM where you can typically scale back the resources significantly without issue.