I am interested in knowing the differences in hardware versions and capabilities, specifically between the DualRX versions ... at this point can a hardware version 5 do everything that a version 6 and 7 can or are there specific limitations as new things are introduced? I am asking because I am getting ready to purchase and was thinking of purchasing a used set but it appears that it is the hardware version 5 and I dont want to buy something that is outdated. Thanks for any insight in this matter.
Larin