My latest book is The Radio Today guide to FLEX-8000
The book covers the four FLEX-8000 radios and the four FLEX-6000 radios.
The chapters on SmartSDR for the Maestro, M models, Windows and Mac will be 99% relevant to the new Aurora radios as well.
I really like the configuration that I bought, consisting of the FLEX-8400 and a Maestro. It allows me to take the Maestro away on holiday and use the transceiver back at home, with the normal antennas etc.
If you are a serious contester looking to create a multi-operator contest station, the FLEX-8600 is a better option.