Just to add (another 2 cents) to the HH sintered pads ...
On my rocket/sidecar set up I took the total weight from around 800 lbs stock to about 1300 to 1400 lbs depending on what I've got in the hack.
Anyway, I had so much weight that I boiled the brakefluid on the front, almost destroying all front braking capacity and then on the rear, I ripped the rear pads from **BOTH** of the backing plates! To make things fun, this was on the same 800 mile long distance trek. I was using the stock EBC pads.
It seems that riding the brakes long and hard (joking aside) heated them up like crazy and was the source of my issues.
Anyway, what finally got me sorted was HH sintered pads all the way around and hi-temp racing fluid. Now I can bring the overweight beast to a stop in very short order. And now I don't have to ride them with full force to stop the rig, so the system doesn't get nearly as hot, and I don't risk life and limb driving the thing.
So I'm a life long fan.