Yes! Marvin works very well for a GTD breakdown.
Here are a few bullet points as for why:
Distinction between action steps (tasks) and projects (project).
Unlimited nesting to organize projects and tasks
Built-in weekly review
Alerts for projects with no next steps
Smart Lists to show only next steps of projects
Backburner to move any someday/maybe projects out of immediate view, can also be used as a tickler file
Note for each category to create a tickler or someday/maybe list
Built-in calendar to schedule any tasks that need to be done on a specific day