I´ve found those to be helpful under different circumstances:
• The Economist: Country Briefings
Economy-centered overviews and dossiers about many countries.
• The CIA World Factbook
It gives a very compressed view of the respective country under many different aspects, among them economic factors. From an american point of view, but apparently factual and with little bias.
There are many others as well, but I didn´t find a good overview that just centered on Europe. Strangely enough, the official EU site didn´t appear to have the information readily accessible.