Don't overlook your local, locally-owned office supply store, not one of the big chains. When I still used a D7, my local office supply store had some Imation/3M 4GB (90 mtr) DDS tapes in stock for less than I could find anywhere online. I tried them as a last resort one day when I found out the last box of DATs I thought I had in reserve was actually the last box I had opened. 3 in the afternoon with a show that night and no blanks, what to do; so I called the local store, they had several brands in stock and I bought a couple of Imations cause they were the least expensive. The D7 had no problems with the tapes and when I needed more I got a great price on boxes of 10 or multiples thereof.