Guys,
Thanks for all the responses. Looking back on the posts now has helped tremendously in making my decision. I'm at the point where I'm ready to make my purchase and I have decided to invest in a better/faster lens and stick with the XSi body.
I took some shots with my friend's 7D and I was not all that impressed. It's better as far as the features we all know about, but it wasn't night and day better than my XSi.
Not only that, I have only begun to scratch the surface of what the XSi can do. I understand now that the current limitation is not the camera, but me. While I am learning a lot a pretty quick pace, I still have not exhausted the abilities of the XSi. Plus when I think about it, I love the camera!
Anyway, moving on to the lenses I am considering a few options:
24-70 2.8L USM
200 2.8L
85 1.8
My needs are to shoot soccer games that will take place primarily during the mid day. I already have a 70-200 4.0L and that's just fine for mid day shooting, plenty of light.
The main need that I have is to shoot baseball at night and basketball indoors and the faster 24-70, 85 or 200 would be much better suited to that task. the 70-200 4.0 is pretty useless for it.
So which lens is best? I like the 24-70 for basketball but the reach of this lens might be limiting for Baseball.
The 200 is good but limiting for the closer focal lengths both in Basketball and Baseball.
The 85 is the same as the 200 as far as pros and cons for what I need.
Which is the better lens as far as sharpness; all things being equal.
Thanks,
Danny