I'm looking to get a lens I can use for sports on the cheap. The 100/2 has served me well, but I really need the extra 100mm of reach (more, really with my crop body) for hs football, baseball season, LAX, soccer, etc . . .
The Canon 70-200 2.8 would be great, but It is more than I want to spend right now.
The 200 2.8 primes look like great values, and I have a chance to buy a clean copy of the first edition for under $500. I've seen the second edition in the low/mid $600 range used. Optically, AF or otherwise is the II worth the extra money?

