The DA7400 group is "legendary" and I wouldn't kick it off my bike if one in good condition happens to come with it, but I do think that the desing on some of the items in the group is not as impressive as the group's reputation suggests. In particular, the crankset. Yes, a clean "modern" design that does not get old to most eyes, but maybe just too clean and too simple. I'd maybe look at a DA7400 crank for one minute to admire it, but in comparison, I'd look at other C&V fluted cranksets like a Campy SR, Stronglight 106, 105bis or 104bis easily three, four, maybe more times longer anytime to admire their beauty.
for this reason, I put Suntour's Superbe Pro group (earliest version) ahead of the DA7400 group in my list......any time....

Chombi