I know it is probably too late, but for others considering SD or CF cards remember that the best prices of the year are typically around the holiday season.
From a technical standpoint, CF cards contain a microprocessor so they are designed for faster potential write speeds than SD cards. The design that permits faster speeds is relatively new, so you can expect dramatic increases in write speeds that future cameras will incorporate. This design supports not only cameras, but specialized applications that use extreme speeds. We had a thread on some of the specifics and links to the CF manufacturers association in the Cafe a couple of years ago.