If you need fast zooms +1 for EF-S 17-55 f/2.8 IS (or the Tamron equivalent without the vibration compensation - it is a sharp lens) otherwise I would say 15-85 or the 24-105...
Also, I went for the 100mm non L as macro lens and never looked back...
Lastly, I have a 70-200 f/4 IS which is a...