well, I'd better start early on the customer support, Don
be sure to check out the www.technicskn7000.com downloads. For the custom format archive a 32 MB card has room to spare. For the composer format archive 64 MB has room to spare, both of these with 727 technics style loads. For technics and midi 128 will last a long time, is relatively cheap nowadays, and won't need so much card swapping. For audio 128 would be a good minimum and 256 give maybe 60-80 cd quality audio tracks with room for the above technics style archive and other stuff.