Hello, if a person runs from the pre outs on an integrated (Arcam A70 in this case) to a pwr. amp is this not just as efficient sound wise as a dedicated preamp? I assume the pwr. amp is out of the line and then not a factor. If the dedicated preamp is still sonically superior I would keep my eye out for a used C31. I don't know of many other units with the input flexibility of Arcam.