One "important" thing to consider is service availability,and communications with mfgr,should you ever have a problem.As well as ease of "updates".A local mfgr,assuming products are in same class,is a good way to go!
I've not heard the Ayre,but did hear the "Dart",and felt though quite good,it was not in a class of it's own,as some may believe.Still,a very good amp though.
Good luck