R, if you consider only the 1Ds and forget about possible replacements, I believe the image quality from the 1Ds is significantly better than that of the D60. I've said before but I repeat--the 1Ds's image quality is as much better than the D60's as the D60's is better than the D30's. The chromatic abberation that some have written about simply is not an issue for me, altho I replaced a Canon 28/1.8 with a Sigma EX DG 28/1.8 because the Canon had too much of it. (See http://forums.dpreview.com/forums....4055226
for more info on that.)
I believe that Canon will introduce at least one more DSLR at PMA, that it'll be mid-level (perhaps equivalent to the EOS 3 in body and focus quality), and that it may or may not replace the 1D. I can't believe Canon would replace their flagship that's only about 6 months old. Maybe they'll offer some firmware upgrades shortly?