Plone. Obsessively focussed on being user friendly.

http://plone.org/products/plone/features/

There are many features that are part of core plone, that many other CMSes do not even think exist in a CMS. Anybody suggesting Wordpress as a CMS obviously did not read your requirement for "most modern in terms of ...user experience".

If you hear negative comments about Plone, it is usually from developers who don't actually use the product or opining based on hearsay.