I must admit to having used Mintex discs and pads on the front of my 2.6 and they are absoultely fine, but my use of brakes is not that hard, I am around the 800 miels a week on a motorway sort of driver so they don't get a lot of use, that said I have had to use them in anger a few times courtesy of some east european truckers and they are good hot or cold. I have also tried Apex which were Ok until I lent the car to the wife......it's an auto and she always leaves it in gear foot hard on the brakes at traffic lights etc. and the Apex discs warped a little, well just one actually but even so.
I have had the green stuff pads and EBC discs, absolutely the worst I've ever used, they don't work cold at all and then the discs warp when hot, worst of both worlds. But that's only my experience.
The Mintex brakes have now done 35K and are showing no signs of any significant wear to the discs or pads so I'm still happy and the brakes work well.
Just my 2p.