In your opinion what should be the calibre of the week?
calibre is a free and open sourcee-bookcomputer software application suite for multiple platforms. It allows users to manage e-book collections, as well as to create, edit and read e-books. It supports a variety of formats, including the common EPUB and Amazon Kindle formats, e-book syncing with a variety of e-book readers and conversion between e-book formats, within DRM restrictions.
Maybe you shouldn't search for the calibre of the week, but instead for the daily calibre... Something like the daily lunch in a restaurant?! In that case I'd go for the approved and good European 7x64 as the daily calibre on a Wednesday.