though i'm not a reporting expert..

Crystal reports -> You can't do alot of processing. You can do better graphical reports..

SQR -> Much more flexible than Crystal reports..

If you are doing complex reports you will prefer SQR. There is a little bit of a learning curve but once you get the hang of it is much simpler to code and maintain. I have worked with both and overwhelming prefer SQR over crystal. In SQR all your code is in easy to read and locate procedures on one screen. It will email, write to text, put your data in arrays, make system calls, publish in PDF, Excel, Word, PP, etc. You get the point.

Hope this helps!
Jason