Looking for a Web based reporting engine that also has web based designer that will work in asp .net

We have an asp.net application that is currently using RDLC reports and providing them to the users as pdf's. It works fine but the ability to modify/customize the reports for our clients is quite time consuming.

Can anyone recommend a tool that we could implement (paid or free) that would allow for pdf report generation with a web based report design tool that would allow our clients to customize (or maybe even setup) their own reports in the browser?

We have found Stimulsoft and DevExpress have tools that look like they meet the requirements but I wanted to put it out to the community here to see what you recommend / have experience with.