Reviews are one thing, but how one uses the lens to produce photos makes the difference to me. I often stop my 7D to f/11 and f/13 where defraction is suppose to be terrible, but don't really see a problem. Brian uses a 5D for his tamron photos and as you can see, they are beautifully done. Its all about PP. YOu have a couple good choices there and I don't think you can go wrong with either one. I was just thinking that the 90mm Tamron would give a little more working distance if you needed it.