Upload & Sell: On
Greg -- I normally shoot RAW, but this last week I played with 1Ds2 and two 1D2's in JPG to adjust WB and compare image qualiities.
I set my cameras to "5" or maximum sharpness in all these cameras (although it doesn't translate using LR, but does for DPP when shooting RAW). In the main menu, first tab, go to Parameters > Set-up to find the settings for Sharpness and Contrast. I found the 1Ds2 to be overly-agressive, right on the edge of too much sharpening and CA (using the same lens on each body) -- it was haloing many straight edges and glowing on hot edges. The 1D2's were less influenced. I don't know why, since they all use Digic 2 processor.
You can adjust your sharpness, but I wouldn't go too low. Try 3 or 4, even 5 for comparison purposes. I add one unit of contrast usually too, so that may affect the edges a little more.
Your Color Matrix can also have a big influence. I use the most saturated, 3H (it's not that saturated, if you've seen my images). But you might check, and dial it down to Standard, or if that was what you used, then Portrait for a softer contrast and color balance.
The 1Ds2 is different than the 5D, and you will benefit by testing the various settings to see what they do. I know at sounds old-school, but it's true. I'm amazed how many possible variations there are in even the 5D, let alone the 1D-series!
RAW is good, but you should be able to shoot your type of picture with JPG and be pretty happy.
And as was said, the jump from 12.7MP to 16.7MP isn't that high of a percentage of image area. It is a useful improvement along with an overall pro package, but not like doubling resolution would be to 25MP.
Hope all the advice from the members is helping you get a handle on how to get teh shots you want.