Do i get to keep my current lenses or forfeit them all and use only one? If i got to keep my lenses, I would upgrade the 70-200 to the 70-200 2.8 IS II or the 70-300L or if i had to choose only 1 lens, I guess it would be the trusty 24-105... Most general purpose range, ok low light, and IS plus great IQ... Not spectacular at any one facet but does a lot of facets very well.