I agree with you that laced boots look better without zips, which is why I looked for a pair without. I've not tried wearing boots with ski hooks though, they'd probably be faster to lace up than D rings.
I used to have a pair of these:
http://img65.imageshack.us/img65/916...50038hz.th.jpg
which were too tight for may calf. The only way to get into them was to undo the top three buckles, loosen the lacing, unzip the boot and insert foot, zip up, lace them as tightly as possible, then buckle the straps. It was more like a form of bondage than footwear!
Chris