consider this. you are on a race and just ripped the brake line, a lever broke, had a crash and your rotor broke, or somethiung happened to your pads or you simply lost some oil. Getting a Hayes rotor, lever, oil, brake line is the easiest thing in the world. EVERYBODY has them.
A friend of mine bent a Hope Mono 6 lever, couldnt race that day, because he slowly started unbending it and cracked it a little. NOBODY had a level. And he spend like 50 bucks, if not more, to get a new set.
05 Hayes Mags are suppost to be as reliable as brakes can get.
I say go for Hayes, when you are on a National race , you can get any part. When you are out in Platterkill, you are simply f0cked.