Need good Organizer App

Does anyone have a recommendation on a good Organizer App? I'm an Outlook User and of course I know about Task Lists etc but for some reason, its not working for me. I want a dedicated app so these things pop. Here's my ideal requirements:

* Strong To-Do/Task List with prioritization
* Good project organizer (not Project Management) but overall project organization.
* Help's me with follow-up and follow-through, like reminders.
* Runs on Mac OS and iPad and in a dream world Droid.

Today I have a MacBook Air, Ipad and Droid for phone. Thank you everyone.

As you've posted this in the iOS forum, I'm going to assume you mean for your iPad.

If you're running Mountain Lion on your MBA, what's wrong with Reminders/Notes/Calendar for your day-to-day stuff? Invisible automatic cloud sync, identical performance on Mac and iOS (sorry Droid), you can set both time-based and LOCATION-based reminders ...

Appigo's ToDo is awesome. It allows for subtasks on the phone. It syncs with remember the milk and Toodleo.