I'm asking about this on another thread actually. If you were shooting for your book, which I guess is 11 * 14
If that is your repro size, why not just a Canon? With proper 16bit import, and proper USM, the Canon is perfect. Unless there are other factors that you don't mention.
For me, I want to also print large on my Epson 9800; really large. Plus, there is sheer enjoyment from opening a portrait from the P45 and seeing three dimensional eyelashes. Would it make a difference in CMYK print at most common repro sizes, 99% of the time? Probably not.
If 11x14 is your target goal, keep your money in your pocket and wait a few more months for the next Canon, and then, if that's not enough, then spring for the medium format. Canon, in terms of workflow and related issues, is braindead easy compared to BS of medium format. Why did a hole?