With Bonsai you can list to the native To Do list - or not - it's your choice.
I link all "active" items - somedays I work from the To Do App, sometimes direct from Bonsai - it depends on my mood. Try it out. It's real popular with GTD followers these days.
BTW Shadow is a great app too - it all depends on which feels "right" to you.
I think they both offer a free trial period so you might as well give one or both a whirl!