[thenerdfiles]

I've been exploring both Alt. 2 and Alt. 3. 2 with AngularJS and 3 with Backbone+Marionette. Evental communication within Models, which are entities, to views and controllers is easy and fun. A model is essentially a service anyway, so methods are more intuitive to name.

[mrjoelkemp]

Interesting. Something else that I should have included as a con for 3 is that Backbone would then be a requirement for the model-based solution. It sacrifices flexibility for smaller projects that need services.