TripAdvisor was invaluable when I planned my trip to Utah in 2008. Now I am planning a trip to Ireland. While I plan on using TA extensively while planning my trip to Ireland I also want an updated guide book that I can read, look at maps in, etc. I have a Lonely Planet 2008 guide which after looking at the 2011 hasn't changed much.
So which one to choose. Frommer's, Fodor's, DK Eyewitness, or ...?