Aaaargh!
Maybe someone can create an algorithm that tosses around various metrics and parameters (cost, distance, affinity to the band, how many times seen in past, type of venue, weather, domestic circumstances, Q rating of artist, frequency of touring/local appearances, etc etc) that can be used to spit out an answer on what to see when there are multiple great choices.
Or maybe a cloning device?
The frustration of 2+ great events at once just hurts my head sometimes.