The early 2005 Broadway Ltd release of the EMD SW and NW2 switchers with QSI sound was very popular and sold out within a month. Broadway announced another run but has continually pushed back the release date, now into December 2005. Furthermore Broadway is noncommittal as to what they will be shipping, we suspect many orders will go unfilled.
Another good option is to look at the Proto 2000 EMD SW8 with QSI coming in November. These appear to be in good supply at least for now.