1) Flippable, 2 bolt leaver blade (2011+ magura, Racing line)
2) 4 bolt clamps and slaves that don't move and are easy to adjust. Best clamp + slave combo i have used is Echo TR slaves + TNN clamps. Big advantage is the smooth clamping area of the slave on Echos (as well as Racing line):
In my opinion, don't go crazy with weight, in the case of braking performance the weight is not so important (i mean, i would take a break that weighs 100g more then a bad brake that is light weight).
Good luck, hope to see some amazing products!