Before you get all crazy about Lufthansa business class, you might want to check out Lucky's post about a recent trip, which seems to indicate that his generally enthusiastic reviews about Lufthansa should be limited to what's in front of the first-class door:
http://boardingarea.com/onemileatati...n-eight-seats/. But, his thoughts suggest a boost for your alternative plans to fly Aer Lingus.
An airline's performance in one area is not a guarantee of great performance across the board.