I have a 60cx that I very recently bought. I bought topo map and it worked very nicly with the 64meg card. I could load pretty much a 200mile radius around my home with space to spare. Just this week I got a Sandisk 1Gig MicroSD card and it works perfectly. As mentioned don't get the UltraII series. See link below. Now I have all of teh Southeast, and a good corridor up through IL and then around the great lakes area. I had the memory storage to hold teh entire eastern half of the US but when I tried to transfer I got an error that I was over a 500 object limit of some sort. Anyhow Citynav 8 is next once I recover from a few car repairs.
Newegg Link