Well if this helps.

I had the same decision to make when building up my NOS Giordana XL Super. Decided on a modern 11-speed silver Athena set to give me a combination of classic looks with modern components. I also kept the chrome fork and put on a heavier set of silver Open Pro rimmed handbuilts. I honestly figured looks were important and that this would be my special, or nice day, rider only. Instead the bike durned into my most used on because it's just such a joy to ride. I'm aroun 2000 miles on it this year so far since the build up. And if I could turn back time I'd have built it up with a modern light C.F fork, higher end C.F Campagnolo groupset, and a much lighter and aero set of wheels. This so I could enjoy the overall riding experience even more. Although the fork would be only for weight savings on my long climbing rides because in terms of ride quality the old steel fork outperforms everything else I have.

So I vote go as modern as you can and ride the snot out of the beast. Bikes are made to be ridden and enjoyed.