I don't think I'll ever understand people wanting to see Perfume live.
Listening to their cd yes, but not a concert. On that list I would say B'z and Arashi look most interesting for me to see live next. (cause I've already seen Ayumi live a whole bunch.) Arashi's last concert DVD I thought was the best concert release all year - it was quite impressive so its easy to see why they top the list.