Originally Posted by
rclouviere
I have a madone that I’m thinking about converting to di2. First, is it worth the extra cost?
if so, about how much is it (excluding labor) and where is the best place to buy it?
It depends on how much you want it! R8070 is clearly better than R8000, but it comes with a price, especially if you already paid for a groupset and want to replace it.
I wanted to upgrade my previous bike with CF rims & Di2 and I ended up replacing it. After running the numbers, I realized that the upgrades would have have cost more. It was pointless (for me).