What is the Best Tablet for Reading Ebooks?

[perseid]

Hi, I'm looking for a tablet with maximum screen size that will open any ebook format (pdf, djvu, mobi, epub). Is the ipad friendly with all these formats? If not, which tablet would you suggest? thanks

 

[Greg Bernhardt]

At the bottom of this page there is a nice chart
http://en.wikipedia.org/wiki/Comparison_of_e-book_formats

 

[perseid]

Thanks Greg, that's pretty handy!