From personal experience EBC reds and Yellows take too long to warm up if you drive your car on the road. Plus i have found EBC quality a bit dubious - brake pads falling apart.
I now use Mintex 1155 pads, good straight from cold, excellant when hot, last a fair while and no quality issues yet.
Also heard good things about the Ferrodo DS2500's mentioned earlier but not tried them.
If you get really stuck good OEM pads should work OK on your lightened car, I have done a trackday or 2 on standard pads without any problems. You do notice the differance but not enough to ruin your fun. Take a spare set with you as well just in case.
Have fun at Silverstone - wish I was going.
Paul