Try the Oppo BDP-105 XLR outs, they will deliever every bit of detail to the B&W's.
I have been running mine directly to the Parasound A51 and it is unbelievablly detailed.
The lastest ETA on a $2 transister if May 30'th, if it does not ship.
Marantz has thus far not stepped up to the bar to do the right thing.
They should have sent you a new one. It kind of surprises me and would only be good business, knowing people would spread the word about good service.