I used two fuse blocks in the first RV (8A). They worked but were a pain everytime I wanted to do anything, and unless you have these things on the front of the panel they are not accessible in flight. Hard to figure out what is going on if you can?t see if a fuse is popped or not.
Second RV I used standard breakers (RV-10). Far more practical in operation.
Current build (RV-8) will also use breakers. Each panel wing (the part that stays in the airplane) has six breakers, Avionics 1 on the left and Avionics 2 on the right. Non-vital loads are on the side switch panel. Only three breakers on the panel but they come out with the panel (2 D connectors, 1 molex, three antenna leads and the SkyView D connectors and the panel is out on the bench).
Never a fan of the old Cessna style copper buss bars. While I?m sure a lot of people use then just fine, they always look to me like an accident waiting to happen. I have a #10 wire from the left or right battery mounted Avionics relays (small 30 cubes) that goes out in pigtails for the power into each breaker. Recommend not daisy chaining power to breakers.
Take the various opinions then do what you want to do.
Carl