I really like my 20D, but the build of my D700 is definitely much better, except for the popup flash and battery door. And after using the D700 since the beginning of January I really like Nikon's control layout, but honestly it's no better or worse than Canon's. Once you get used to shooting Nikon the Canon control layout feels weird. If I went back to the 20D for a few days then the Nikon would feel weird. 
Both take nice images 



