I have a good opportunity to get a 70-200 F/2.8 IS. It''s not the Mark II but it's a good price. I know the new mark II is better but is it really $1000 better? That's what I am looking at. I can get one that's 2 years old and the guy claims he used it "once" and it's been in his closet in it's bag the rest of the time. It looks new. I don't know if I can pass it up. I have read the reviews and know the F/4 and new Mark II is a little sharper. Is the "old" 2.8 going to be okay for portraits? Fine art? I already know it will be okay for action. Thanks.