iOS Reminders app recommendation...?

I'm looking for a new Reminders app. The default one is functional, but I've been using it for a lot of daily task scheduling, and the interface is tedious for input.

HOWEVER. It must integrate with the built-in Reminders app, like Fantastical and whatever do with the calendar. Must. If I can't check things off as done from the Notification Center, it won't work for me.

Anyone have a suggestion? I'm happy to spend $5 on a great app!

[edit] I think I'm asking more for a fancy entry interface. Something that surfaces the scheduling better than Reminders.app, which requires you to enter the task, then edit, then set up the time. I want something like Fantastical (fast entry) that adds to Reminders.app so I can check them off from NC.