These would cost $320/set, plus the cost of non-integrated shifters.

The problem with this forum is that someone asks a question about mechanical discs/ rim brakes on a specific line of bicycles, and a bunch of ppl recommend hydros that won't work with his intended set-up or else would require a ton of $$ and massive changes to other systems on the bike. Why not just cast your vote for the various options he actually asked about?