changing your brake bias can be a problem so unless you know your compounds pretty well I wouldn't like to experiment....you never want your back brakes to take over on a bend.
I was looking at the QFM A1RM's but they are a bit too dusty for my liking (bendix Ultimates are apparently worse though) and they don't make them for a Brembo caliper. I'm in the same boat with EBC Greenstuff.....not made for Brembo caliper, hence why the Redstuff which is actually a Kevlar pad with Ceramic particles. Having said that, if you want QFM's for Brembos, you can send your backing plates interstate and be without your car for awhile, they can rebond them for you with any compound that you like.
Most good pads wont be at their best from home to the local deli but the redstuff doesn't need to glow before they bite......just warm.
Your bro in law has affected the brake bias of his car, not recommended. His rears may bite too hard in the cold.....see below for front/rear combinations: EDIT: They would obviously be fine when hot because the fronts would then bite harder.
On Front.............OK to fit or have on rear
Original........................Ultimax only
Ultimax........................Ultimax or original
Greenstuff....................Greenstuff, Ultimax or Redstuff or original
Redstuff.......................Redstuff or Original
Yellowstuff....................Yellowstuff,Green,Red,Ultimax or original