Reporting Portal Hosting Queries

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ASP.NET

Hello All ,

I am creating one website in ASP and am using Visual Studio 2008 and SQL Server 2008.I need to include two reports into this website which will pull data from stored procedure and display Or download the report.
I know how to use reporting control in ASP and also know how to render it with stored procedure data.
My Questions/Queries are below :

1) Should I use crystal report for this purpose ? My worry is should it required additional installation when my user access this report. Because some time may happen that user not have crystal report runtime installed on there comp. then What will happen ?
2) Should I use data report for this purpose ? Should it be capable of holding all the functionality (Parameters , Attach to stored procedure , Ontime calculation, Image include , print , export to PDF/Excel/Word ETC) that crystal report have.

Also I don't want to display report on my website . Better say I don't want to include report viewer control into website . rather that I want to use report object , create the report data and download them in PDF format when user click on Download button.

Please guide me

Thanks in Advance .
Kitanjal , Freelancer