I had a similar dilemma a couple of times and this is what works best for me: the bikes I want to use for "performance cycling" (I try to ride at least one "cycle sportive" in mountainous regions every year) get modern parts for the comfort and to keep weight reasonable. All other bikes I try to build period correct.
If I had your bikes I'd go for a modern Simoncini. ;-)
I had a similar dilemma a couple of times and this is what works best for me: the bikes I want to use for "performance cycling" (I try to ride at least one "cycle sportive" in mountainous regions every year) get modern parts for the comfort and to keep weight reasonable. All other bikes I try to build period correct.
If I had your bikes I'd go for a modern Simoncini. ;-)