The Campag stuff does look good but the newer horn shaped Ergo hoods don't look nearly as nice to my eyes as the slightly earlier ones, in fact they tend to put me off (and they should be judged on function rather than form but when fitted to such a nice frame as your IF, and given the expense involved, for me form has to come into it).
I know it steers away from the coherence of a whole groupset, but if the rest of the Ultegra group works for you then what about fitting a non Shimano chainset (I'm not thinking SRAM or Campag, rather a manufacturer that doesn't produce groupsets)?