Thank you for the information. As I am not shooting any video and really have no plans to, the differences between CF and SD hold little sway.
Now the over-heating thing, I had not been aware of and will need to investigate. My investment in CF cards include 1 4GB, 3 2GB, 1 1GB and 2 512MB cards. Probably would purchase 3 8GB cards depending on the number of RAW images they could hold. Might have to go with 16GB but then I could only get 2 to start.
Also have to get at least 1 extra battery.
Nothing is easy, including buying a new camera. I remember the turmoil I endured getting my used D30 (it early was a Nikon D100 (new) but really wanted the CMOS sensor). There was even a false start with a Fuji DSLR (24 hrs).
There is nothing wrong with the 20D. It has produced images capable of 16x20 without issue. Guess I'll save the $$$ and wait. :)