Upload & Sell: On
Roger, if you don't mind the weight, then there is nothing like having a 1ds iii or 1d iv in your hands and hearing those machines fire.
I also believe that for the most part both of these cameras you desire, will hold their values for some time to come, especially after the 1dx is released. Since both of these cameras offer things the 1dx can't/don't.
Also, the 1ds iii does not do video, so if you want full frame video, then maybe hang onto that 5d ii.