I have used both the Canon 70-200mm F2.8L IS v1 and the Canon 70-200mm F4L IS on my 60D. These are both great lenses. They are sharp from center to corners on my 60D, and they both have color and contrast that I find very satisfying. I have not used the 70-200mm F2.8 IS v2, but I am sure that it is a great lens and likely better in terms of sharpness than the older lenses based on the reviews I've read. The questions are, what do plan to use the lens for, and how big to you plan to print your photos? The older lenses are plenty sharp for prints up to A3 (~12 X 17 inches, largest I've done). The F2.8 lenses will be better for sports and portraits, but the F4 lens is much smaller and lighter so it has a big advantage for travel, hiking, etc. Good luck.