Away from the Campag/Shimano playground squabling….
I suspect, stilltortoise, you’re probably not really looking for an ultimate bike, just a much nocer one than you have. Heading into something where you (by admission) have minimal knowledge suggests that you may not be confident of making the right decision if having a custom frame and build.
Stick with the research first to see what you think would be a reasonable overall budget and then start thinking around it from there.
Oh, and the riding on the drops thing is down to bike positioning. Most road riders use the hoods, and I’m also of the view that drop bars are often too deep for non-racing riders (indded, plenty of racers I know only use shallow drops).
Go to somewhere decent to get a bike fitting done and discuss with them the type of riding you want to do and what you want the bike for. I reckon frame material, construciton, component choice will flow from that, rather than the other way around.