I don't know tbh. Me personally, I'd like to see the build. Its great seeing mostly period correct builds on the forum, and the odd mix of old and new is fine. Wouldn't be so keen if the balance was the other way round though, so I can appreciate your question.
I'll be having the same question this coming year as I'll be fitting a modern drivetrain to a 1996 Kona. The longer I have the bike, the more I love it, but its definitely a bike to use. Love the frame and the feel of it. Some of the components are gassed and need changed to something, so it'll be modern parts for now, but its seen many variances over the years.