Re:
I use sintered as I usually get nearly 12 months riding out of a set (30>60 miles a week in shit usually) and my local terrain can be a bit gritty and sloppy at times , wears the rotors a lot faster than organic but 3 years or so per rotor and 12 months per pads is better than every time out for new pads like some of the cheap organics , the race matrix ones I found loud and a bit numb when cold , (in the hopes anyway, not tried em in the Avids) so I stick with sintered , just bed them in properly when new then never touch them till they are worn out n time to change.
Other people will have different views but I've never had major brake failure from tootling along towpath to trying to ride down Ben Nevis .