Agreed on the 400CX/700CX groupset. My 93 Univega Via DeOro has an interesting mix of CX. The derailleurs, shifters and crank arms are 700CX while the canti brakes and wheel hubs are 400CX. The cassette is 11-19. Unfortunately the index shifter for the rear had been removed so I am running a friction shifter for the rear. After cleaning up everything and lubrication, the CX components have been flawless. The bike is very smooth shifting and silent running. I don't see a reason to change out anything at this time. the only thing I have thought about changing is the cassette to one that has a bit more range, such as an 11-25 or 11-28. Since the refurb about a year ago I've put over a thousand miles on it with no issues.