1. if you have cash, yes.
2. yes.
3. don´t think there is any difference in speed between the three.
4. Mediator (see Elbox website)
5. only Mediator is still being produced and for G-Rex you did need a PPC turboboard to connect it to.
Both Prometheus and Mediator could connect to a standard A4000 and Mediator can also connect to any A1200 in tower ...
