Not soo easy. My first thought was 10-22 EF-S, 35mm f2, and 70-200 f4 IS.
I'm not sure about the 10-22 though, I might replace that with a 15-85 EF-S. This would mean that the prime lens would no longer need to be in the middle of 22mm and 70mm where the hole was in the first lineup. And here comes the problem, there is no prime that really suits me. I would like to see a 30mm f1.4 or f1.8, that is sharp wide open, with a small minimum focusing distance (this leaves the Sigma 30mm out). The Canon 28 f1.8 comes a little short on image quality (I'm hoping for a new version of that lens, seeing what Canon was able to do with the 40mm f2.8).