Ask HN: report system, Excel or HTML?

Hi Developers & Designers

I am a Rubist and now working on one report system, and decided to using excel(and template) to build the report, I chose the excel template because of two:

1. let the end user design the report by excel 2. let end user print the report in excel

but the problem is that it is hard to deal with the report with huge data, and now I want to choose raw HTML, the long report can be easy handled by adding pagination. And do you know any clean HTML report available on www?

Thanks!