No you're right about duplication at the 85-100 end. A 35L on a crop sensor body would be fine, since it's 56mm cropped in. Again it's your call and what perspectives you want. Personally, I shot with an 85mm on a FF body so I was shooting just that, 85mm. That's why I recommended the 50mm for the crop body. A 35mm f/2 would work okay on a 60D but I didn't like it on FF because the corners were pretty bad. They were not as bad as on a 7D. If I were you, and let's say you did get a 24-70 mm zoom lens, whichever one you had, that may serve your purposes on the FF. If you planted the 50mm on the crop body, you'd have an 80mm prime in a sense. Again though, the 35 works because 56mm is OK too for a lot of wedding shots. It's not an easy choice because you'd put the lenses on the different bodies, so it's totally your call. The 24-70 will take care of a lot of it. And realistically, why couldn't you switch lenses and put the 24-70 on the 60D for awhile? When the bride is coming down the aisle though, I personally liked the 80-85mm focal length from where I was. You could achieve that two ways: 24-70 on the 60D, OR a 50mm prime on the 60D. Again, I know I'm adding more confusion, but it's your call. I didn't have a crop sensor at the time, I only had a 5D Mark II and 1D Mark III, so I had to have an 85mm lens; you don't.