For now i dont have any lens for canon. But i have huge set for my nikon d300s:

1. Nikkor 35/1.8G
2. Nikkor 50/1.8G
3. Nikkor 70-300
4. Tokina 11-16/2.8

5. Nikon SB-900
6. Nikon PDK - 1

So i dont know it is good idea to change system :/

My main photo theme are: street, sports, portrait