instead of the 28 1.8
16-35 2.8 USM II used, bought one in excellent shape for CHF 998.00 this April
Buy highest quality, don't look back.
Buy the 24-70/2,8II.
If you are more the tele- type: 70-200/2,8II.
I love my 35L and 135L. But the two zooms I use 80% of my shots because of their versatility.